"About Mac OS X v10.6.6 Update
The Mac OS X 10.6.6 Update is recommended for all users running Mac OS X Snow Leopard and includes general operating system fixes that enhance the stability, compatibility, and security of your Mac. It also includes the Mac App Store, the best way to discover and buy new apps for your Mac. The Mac App Store, a new application you'll find in the Dock, includes the following features:

• Discover Mac apps: Browse featured apps, top charts, and categories, or search for something specific. Read detailed app descriptions and user reviews, and flip through screen shots.
• Buy and install: Easily purchase apps with your iTunes account. Apps install in one step and are quickly available from the Dock.
• App updates: The Mac App Store keeps track of all your purchased apps and notifies you when free updates are available.

To learn more about the Mac App Store, visit: www.apple.com/mac/app-store.
For detailed information on this update, please visit this website: http://support.apple.com/kb/HT4459 (About the Mac OS X v10.6.6 Update which also lists:)
Additional improvements:

• Addresses a cropping issue with some postscript printing in landscape page orientation.
• Resolves an issue with some Macs (that have in (an) ATI graphics card) in which the mouse pointer movement could become erratic if an external DVI display is connected.

For information on the security content of this update, please visit: http://support.apple.com/kb/HT1222."
(Here's the specific doc About the security content of OS X v10.6.6)

Here's the download pages:

• OS X v10.6.6 Update Combo
• OS X v10.6.6 Update (Delta)
• OS X Server v10.6.6 Update (Delta)
• OS X Server v10.6.6 Update Combo

I've included OSX 10.6.6 and app store related Apple docs below. I've not installed 10.6.6 yet. (Not in any hurry personally.) BTW - Sponsor OWC has an article w/their first impressions of the Apps store.

FYI for Quadro 4000 Mac Owners upgrading to 10.6.6:
Included in today's 10.6.6 related apple docs is one noting new Quadro 4000 owners need to Reinstall the Nvidia Quadro driver update after updating to 10.6.6. To save you a lot of clicks (the doc links to the nvidia product page) - here's the page with the current (as of this AM) Quadro OS X 10.6.5 Driver page which still shows the 11/16/2010 driver date/v256.01.00f03. But the file I downloaded this morning is named "Retail_256.01.00f03v5.dmg" (28.9MB) - dated Dec 17th. The file I downloaded back in mid-Nov does not have the "V5" in the filename and is larger (37.3MB). I don't own this card and not dug into the pkg to see what changed (i.e. did they remove the extra kexts for other models perhaps?) but just a FYI.
  

"About Apple Remote Desktop 3.4 Client
This 3.4 update is recommended for all Apple Remote Desktop users and addresses issues related to compatibility.
For detailed information on this update, please visit this website: http://support.apple.com/kb/HT4458. (About Apple Remote Desktop 3.4)

System Requirements: OS X 10.4.11 or OS X v10.5.7 or later"

Download page links:

• Apple Remote Desktop 3.4 Client
• Apple Remote Desktop 3.4 Admin
• Apple Remote Desktop Dashboard Widget

• About the security content of Mac OS X v10.6.6
• Mac OS X v10.6.6: Reinstall Nvidia Quadro 4000 driver after installing Mac OS X v10.6.6 Update (see notes above)
• About the Mac OS X v10.6.6 Update
• About the Mac OS X Server v10.6.6 Update
• Mac OS X Server: Admin tools compatibility information
  
  App Store Related:
• About the Mac App Store
• Mac App Store: Frequently Asked Questions (FAQ)
• iTunes Store & Mac App Store: Best practices for protecting the security of your account
• iTunes Store & Mac App Store: About your Apple ID and password
• Mac App Store: Changing your account information
• How to create a Mac App Store account
• Using an existing Apple ID with the iTunes Store and Mac App Store
• Mac App Store: Finding your purchased apps
• How to browse and purchase from the Mac App Store
• Troubleshooting the Mac App Store
• Mac App Store: "An unknown error occurred (100)" when purchasing
• Mac App Store: App purchase doesn't appear to complete
• iTunes Store & Mac App Store: Seeing your purchase history and order numbers
• Mac App Store: Backing up your app purchases
• iTunes Store & Mac App Store: About credit-card authorization holds
• Mac App Store: How to resume interrupted downloads
• iMovie '08 & iMovie '09: Some media may appear missing after installing iPhoto '11 from the Mac App Store
• Mac App Store: How to redeem a code
  
  Others:
• About Apple Remote Desktop 3.4
• How to uninstall or disable Apple Remote Desktop 2 or 3
• iMovie '11: Some camcorder video clips may not be visible in the Camera Import window
• iMovie '09: Importing AVCHD clips from some multi-format camcorders may require additional steps
• iMovie '09: MPEG-4 clips in some camcorders may not be accessible from the Import window
• Logic Pro 9.1.x, Logic Express 9.1.x: Some features may not be available in 64-bit mode
• Why aren't songs with the same album art grouped together?
• iOS: How to transfer or sync content to your computer
• How to identify MacBook models
• USB and FireWire Quick Assist
• OS X v10.6.5: Unable to Install SuperDrive Firmware Update 3.0

• Snow Leopard Cache Cleaner v5.0.14
• Pages EndNote Plug-in (for apps store Pages download)
• Adobe Photoshop Elements 9.0.2
• TextWrangler 3.5
• Google Chrome 9.0.597.42
• Assassin's Creed II Deluxe Edition - Now w/SteamPlay