15" PowerBook to not be updated?

So, I'm in the market for a new PowerBook, but not the current generation 15" PowerBook. I want to wait until Apple updates the 15" Titanium 'Book to Aluminum, like the newer 12" and 17" models. A buddy of mine in the UK heard from a friend of his who heard from the local Apple store that Apple was not going to be updating the 15" PowerBooks this year. I find that really hard to believe, and I'm going to defer to this information about forthcoming AlBooks. I hope it's coming soon. It's time to get rid of my iMac and 3-yr old PowerBook. Anybody wanna buy one of them? $1100 OBO for the iMac (800MHz G4/512MB/60GB/SuperDrive), $1000 OBO for the PowerBook (500MHz G4/384MB/20GB/DVD). BTW, the PowerBook's been upgraded with a G4/500 processor.