I'd like to see Jim Collas involved again - at least he understood that what made an Amiga was a combination of innovative software AND hardware. I've never bought that the Amiga OS was what made Amiga special - it was a contributing factor yes but many Amiga users (particularly those without a hard disk) never even saw Amiga OS let alone used it on a regular basis.
Times have changed and PC hardware components have become much more like a componentized custom architecture (CPU, GPU, sound card) but the way we use these things has not progressed much. Mac OS X is a step in the right direction and Windows Longhorn promises much but it takes an Amiga to really push the boundries :-D
We'll probably never see another bespoke Amiga system designed from the ground-up to be a multimedia powerhouse but for the short time Collas was in charge it was good to dream. I can't remember a time in recent history when I was so excited about the Amiga's future as when the MCC was announced *sigh*