Might be time to update this Sticky.
AMP is now dead, MediaCentral is alive but not very user friendly (IMHO), iTheater and CenterStage are still in their infancy and show no real signs of maturing, Apple's FrontRow works extremely well, if somewhat limiting - but - it can be enhanced with Voice Commands etc.
Parallels Desktop and VMWare Beta are worth mentioning as well as TinyXP to run a decent GPS app. OSX GPS software is non-existent. RouteBuddy for OSX sucks (I bought it with maps ($170) - it sucks) and nothing else exists for OSX. Virtual PC for PPC works well albeit somewhat slowly.
Roland Edirol UA-1EX is an excellent analog line output device for driving car amplifiers with superb quality. Much better than splitting a 3.5mm earphone jack (again, IMHO)
And last but certainly not least, Carnetix 1900 should be mentioned as the power supply of choice.
