I wouldn't wait till Apple releases a Mac with an Intel CPU to buy one. I won't be the one to "test out" the problems and such.
I suggest stick to the already-mature Power PC processor and wait until the Intel Macs get better. Plus who knows if they're really releasing a PB in January?
They may also be more money, like someone suggested.
Plus, remember. Right now, 100% of Mac users are running on Power PC CPUs. Which means that all the apps are written for the Power PC (OSX can do both).
Rosetta's supposed to translate apps that run on PPC to run on Intel, but how well is that really going to run? We all saw it on Mr. Job's demo last June, but remember; he was running a really fast CPU with 2GB of RAM.
I don't know about waiting for MacTel...I'd buy one of the current models now if I were you (I already did, just waiting for mine).
Good luck on your decision.