I'm already having way too much fun with capturing movies from WoW and streaming them to my
TV 
http://www.worldofwarcraft.com/patchnotes/
Highlights: Voice Chat across the board, Mac Movie Capturing, Mac Graphical Optimization, and iTunes controls
Mac Movie Capture: the Mac client can now capture in-game video to QuickTime movie files using a configurable choice of codec, resolution, and frame rate. New keybindings have been added to the Key Bindings dialog. For more detailed configuration options please see the Mac Options panel in game. Mac OS X 10.4.9 and QuickTime 7.1.6 or better are required. Not all machines have enough performance to smoothly capture video at high frame rates; end user experimentation will be required to find appropriate settings for each system.
Additional graphic optimization utilizing AltiVec for PowerPC-Mac and SSE for Intel-Mac. This provides some performance benefit on systems where vertex animation shaders are either unavailable or disabled (recommended on systems with Intel integrated video).
Mac Options dialog has been added to the primary options panel. This dialog offers configuration options for any features that are presently unique to the Mac client, such as iTunes Remote and Movie Capture.
New iTunes Remote configuration options have been added to the Mac Options panel.

http://www.worldofwarcraft.com/patchnotes/
Highlights: Voice Chat across the board, Mac Movie Capturing, Mac Graphical Optimization, and iTunes controls
Mac Movie Capture: the Mac client can now capture in-game video to QuickTime movie files using a configurable choice of codec, resolution, and frame rate. New keybindings have been added to the Key Bindings dialog. For more detailed configuration options please see the Mac Options panel in game. Mac OS X 10.4.9 and QuickTime 7.1.6 or better are required. Not all machines have enough performance to smoothly capture video at high frame rates; end user experimentation will be required to find appropriate settings for each system.
Additional graphic optimization utilizing AltiVec for PowerPC-Mac and SSE for Intel-Mac. This provides some performance benefit on systems where vertex animation shaders are either unavailable or disabled (recommended on systems with Intel integrated video).
Mac Options dialog has been added to the primary options panel. This dialog offers configuration options for any features that are presently unique to the Mac client, such as iTunes Remote and Movie Capture.
New iTunes Remote configuration options have been added to the Mac Options panel.