Here's Apple's list of changes in Apple TV v2.0:

• In the US, rent movies from the iTunes Store in Standard Definition, and stunning High Definition with Dolby Digital 5.1 surround sound directly from Apple TV.
• Buy TV Shows, music and music videos on Apple TV. These will automatically sync back to your computer.
• Browse and enjoy the iTunes Store podcast directory of over one hundred thousand video and audio podcasts.
• View photos from .Mac and Flickr galleries.
• Play your iTunes content on the audio system connected to your Apple TV via AirTunes.

FYI - here's some new and some recently updated Apple TV related docs:

• Apple TV: About Apple TV software version 2.0
• Apple TV Fast Start: The New User's Guide for Apple TV
• Apple TV: How to upgrade Apple TV software to version 2.0
• How to rent a movie from the iTunes Store on Apple TV
• How to Purchase TV Shows, Music, and Music Videos on Apple TV
• Apple TV: Tips and Basic Troubleshooting
• Troubleshooting Apple TV not recognized in iTunes
• Apple TV: Not able to sign in to the iTunes Store with an AOL account (requires .mac acct)
• Apple TV: Connections through proxy servers are not supported
• Apple TV: Some menu items may not appear with software version 2.0 (due to wrong iTunes store country selected)
• Apple TV: Not showing in the iTunes device list when connected on Ethernet
• Apple TV: What kinds of music and movies can I play on Apple TV?
• Apple TV: Initial Configuration
• Apple TV: Broadband Internet connection required to playback iTunes Store content
• Apple TV: What You Need
• Apple TV: Switching between wired and wireless networks
• Apple TV: HDMI video is too dark or too light
• Apple TV: About standby mode
• iTunes Store Movie Rental FAQ
• Apple TV: Adding Podcasts via iTunes

" Microsoft Office 2004 for Mac 11.4.0 Update
"This update fixes a vulnerability that an attacker can use to overwrite the contents of your computer's memory with malicious code.
Released: Tuesday, February 12, 2008"

Also got a PR email from Prosoft Engineering that they've released Drive Genius 2 they say includes "Improvements to speed and overall performance as well as full support for Mac OS 10.5 (Leopard)" List price is $99; a $59 upgrade for previous v1.x users.
FYI - a reader sent a note about the upgrade:

"Mike, Just a heads up. Read your PR post and ProsoftEngineering seems to be having some issues (working on them) with their database of serials and the email link for the downloadable DVD is still old. Just off the phone with their "very helpful" sales and things should be fixed soon (still needed to call in and I had record of old serial (begins with letters) and forgot newer one of 1.5.x).
Otherwise, they are shipping me out the new one. Woot! Thanks again for the tip!
-Ed S."

"Hi, Mike. I just wanted to report that 10.5.2 apparently fixed completely the infamous expresscard/eSATA hard drive issues that were widely reported since Leopard came out. This is using the existing SI3112 1.1.9 drivers from Silicon Image (which I re-installed after the update) on my MBP 2.0 Ghz.

I am using the Apiotek expresscard/34 solution, but they all use the same chipset (other brands/models require that you use a vendor-provided driver and will fail with the "generic" SI drivers). (FYI - Most all are as mentioned before, but the exception I think is the Firmtek eSATA card. And the Apiotek eSATA card has some of the most favorable feedback here in the past, as well as costing much less than many others)
My WD MyBook Premium ES drive (eSATA/USB2) was one of the affected drivers that would not work with Leopard, as it was the case with "combo" eSATA/USB drivers. It works perfectly now, including Time Machine back-ups (which wouldn't even start before). I had been using it with USB2 since Leopard broke expresscard/eSATA.
I've been meaning to write to you to say that the problems were strictly Leopard-related. Now that it's fixed, expresscard/eSATA is a solid combination.
(He later wrote in reply to some eSATA Expresscard users (including the last eSATA expresscard/10.5.1 report here) that hadn't mentioned a problem - although many have in the past here, even before Leopard was released. But then there's a lot of variables (case/bridges, etc.).-Mike )
... I'm afraid It was more complicated than that. The expresscard/eSATA problems were narrowed to drives with a dual USB/eSATA chipset. "eSATA only drives" were working well. Some expresscard vendors found themselves in a tech support nightmare and said in their web sites that these USB/eSATA dual interface drives have a non-compliant chipset. In any case, compliant or not, they are working well again with 10.5.2.
Best, Adolfo R.
Argentina"

Hopefully others that had problems with their eSATA expresscard setup also finds the update helps. If you're using Leopard with a MacBook Pro and eSATA Expresscard, let me know if the update helps with any problems you've had. Thanks.

" Apple Releases Aperture 2
Apple today introduced Aperture 2, the next major release of its groundbreaking photo editing and management software. Featuring an improved interface, faster browsing, and enhanced image processing, Aperture 2 delivers more than 100 new features that make it faster, easier to use, and more powerful than ever. Thanks to its new low price of $199, anyone can easily organize, edit, and publish photos like a pro. Owners of previous versions of the software can upgrade to Aperture 2 for just $99"

Here's a list of Aperture 2 related kbase docs I spotted also:

• Aperture 2: Tips on migrating images to RAW 2.0
• Aperture 2: Some tips on Baseline DNG support
• Aperture 2: RAW 2.0 not available with some cameras
• Aperture 2: Some referenced images may be reimported even when Do Not Import Duplicates is selected
• Aperture 2: Newly supported images may not display properly after upgrade from Aperture 1.5.x to 2.0
• Aperture 2: Avoid making manual changes to your library structure
• Aperture 2: Avoid putting the computer to sleep while shooting tethered
• Aperture 2: Date on exported master image may be different in rare circumstances
• Aperture 2: Externally edited images are automatically located alongside originals
• Aperture 2: Tips on tethered shooting
• Aperture 2: Duplicate Images in library when tethering

While on the subject of Aperture, Apple has updated their previous doc on Aperture: Set Time Machine to exclude Aperture library from automatic backups (to avoid corruption of database if Aperture running during TM backup or restore) with a note 10.5.2 resolves this.

" About iLife Support 8.2
This update supports system software components shared by all iLife '08 applications to improve their stability and performance. (Mac OS X 10.4.9 or later) "