A few points:
Apple lost sales in the first half of the year on the PM because a lot of people were waiting for the 3 gig announcement. WHen it came out at 2.5 gigs everyone yelped, but orders went up. Moaning about the delays of the 30" because of component delivery schedules, but that's gonna kick sales up a notch.
Same with the iMac. I was ready to pull the trigger on a G4 20" BTO, but decided to wait when I read that IBM was ramping up the 90nm chip fabrication, starting last December. Holding off until Day One of the new G5 iMac - and have been holding for close to a year. Lots of other iMac purchases put on hold for a G5 also.
Both hurt sales and both were due to supplier problems. One of the joys of pushing core products to leading edge technology, but the orders for the iMac will explode. Those who think it will be a slow seller need to remember the iPod mini that everyone said would not sell.
Hopes of a headless iMac (or PM mini) are going to be dashed until IBM has an abundant supply of G5 chips - then those crying for one will have a chance.
As far as the AIO iMac - it's going to be perfect for me as I'm tired of a mass of computer hardware at home. Just give me an AIO with a 20" screen and I'll be happy. I can BTO it to max out some parts and will live with the rest. (Using a new PB at work with a 23" screen has shown me that I don't need dual 2.5s even at work.)
For "normal customers" an iMac is going to look pretty good when compared to the offerings at CompUSA, Best Buy or Dull - as long as they take a close look. Otherwise the sales guy will say,"Don't get a Mac, they're too expensive and there is not software available for them."
Finally, people moaning about the G5 iMac ("they need to do this or I'll buy a Dull") tend to forget about the joys of Windows. I've dumped my office XP PC because I'm bloody tired of the patches. SP2 is going to be a joy and the mess that will follow will make 3.1 look very attractive to migrate back to.
If you think a computer should work without virus/worm/spywre crap, weekly security patches for problems that have already spread and a LONG wait for Longhorn then get a PC. Just gotta have something that will fly with Doom 3, 4 & 5? Get a hot PC & have a ball.
Apple will deliver what they can and they will continue to be profitable - the only major computer maker besides Dull that makes a profit. Thye will release a design that reflects their best efforts and will use components that provide the best balance they can while remaining within their normal policies. It will be like any other Apple computer: buy it if you like it. Moan on the boards if you don't - and let Apple know what they should have done to be successful.