(Original (2006) Mac Pro (1,1) running OS X 10.6.7, using a spare mb SATA Port)
"Mike... An update;
Got the (Pioneer) BDR-206 yesterday and yep, disappearing drive same as everybody else. I've left drive sleep enabled for now as for some people the problem cleared up on its own.
(On its own? maybe try clearing caches, resetting nvram.)
But the drive works very well with all media types.
Somewhat noisier than the LG, but we can't have everything.

There are no firmware updates for it at the moment (as of April 30th, 2011) so I'll sit tight.
Connected it in exactly the same manner as all previous drives (in earlier report), (ODD_SATA).
My drive info, (as gleaned by MakeMKV), is;
Current profile: BD-ROM
Manufacturer: PIONEER
Product: BD-RW BDR-206D
Revision: 1.04
Serial number: JKDP0039****
Firmware details: intf=SAT gen=1030 krnl=ID61 main=ID61 ver=0002
Firmware date: 2010-11-17
Cheers...
-DG"

He later sent more notes and 3 screenshots related to the drive going to sleep issue. Due to space I've added that (and the above) to last week's page on Mac Pro Blu-Ray and DVD Burner Upgrade reports.
  

"Myth II 1.7.2 Released!
Myth II 1.7.2 Final is now available:
http://projectmagma.net/downloads/myth2_172/.
Version 1.7.2 is the latest installment in the 1.7 series of updates, bringing massive performance improvements, numerous bug fixes and several new features to the game. Some of the highlights of the 1.7.2 update:

• Massive OpenGL optimizations, especially with detail textures (2x - 5x as fast on modern hardware)!
• New DirectX10/11 rendering backend
• New event-based input system that guarantees every character typed will be registered.
• New preference to automatically save multiplayer films.
• Elimination of up to two ticks of baked-in latency in the Myth net code.
• Overhead map zoom level will now be saved between games.
• Fix for the endless "Waiting for other players..." dialog.
• Type-to-seek functionality for the new game, recordings and saved game lists.
• Restored custom plugin images in the single-player new game dialog.
• Added new high resolution icons.

And many, many more. A list of changes is available in the 1.7.2 Read Me.
(Special thanks to all those who participated in our public betas, your feedback was essential to catching and correcting a number of issues.)

For those who might not remember the Myth gaming series, pop over to Project Magma's 'What Is Myth?' page and also check out the Myth Wikipedia section.

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