While interesting, the link that Zippy posted is to a discussion along the lines of "my uncle is an engineer at Quantum and he says that they will be released soon" - which is a second-hand rumor. I tend to believe that he has a real 10krpm IDE drive, but I don't believe him when he says that the only thing holding up the release is the marketing dept. coming up with a name. No offense intended, Zippy, and I thank you for the link, but I choose not to believe it all at face value.
My prognostications (based on educated guesses - not my uncle's cousin's girlfriend's brother who works at Seagate ; ) ):
I'm fairly certain that they will arrive in 2001 - most likely by late 2H. But I feel confident that they will be available in 2002. There's virtually no chance that they'll be out in Q1 since there have been no press releases, no warnings, no articles in EETimes, nothing. The IBM GXP60 and the Quantum Fireball AS were both announced back several months ago and you still can't seem to find these anywhere. If 10krpm drives were right around the corner, we'd know it..
I don't think noise or heat will be a significant issue - look at the SCSI line and you'll see that they have these issues mostly solved.
I don't think that they will be priced ridiculously above 7.2krpm drives - this is the IDE market and it's brutal in terms of competition. They will be more expensive than 7200 rpm drives, but I don't think that they will be priced ridiculously high.
They will probably have lower densities than current 7200rpm drives - I hear head vibration is an issue limiting high densities.
We will see if I'm right. One thing to note is that the manufacturer's all rely on the high margins of the high-end SCSI business to support low margins in the cutthroat IDE business. They are not going to eat into sales of 10krpm SCSI drives until they are confident that they can produce high-end 15rpm SCSI drives with low-noise, low-heat, high densities and in reasonable quantities. And that they have a bullet-proof 10krpm drive that can be mass-produced in huge quantities. The only manufacturer currently supplying 15krpm drives is Seagate.