These are great boxes, and fairly priced for what you get. Should sell like hotcakes to the pros.
But these new machines just make the hole in Apple's product line that much more obvious. No headless machine between $799 and about $2199? No machine between yonah dual 1.6 and xeon quad 2.0? No machine with swappable video card for under two grand??? You'll be able to get a smoking dual core conroe PC for probably half that.
I just hope this isn't the last of the line (hopefully apple is just saying that to brag on the transition speed) and there's a cheap midrange tower running conroe on the way.
If that doesn't happen, Apple needs to update imac and even the mini to fast conroes ASAP. Both were great models at reasonable prices when they shipped, but they're looking long in the tooth and overpriced now. Updates would help close that gap in the product line.
The pros are a HUGE improvement in expandability over the crappy internals of the G5 tower, and the extra usb ports (even 800 on the front!) are very nice. I think it's a bit cheap to leave off the BT and wifi at those prices though, and even though they're pro machines they should throw in Front Row and the remote.