No, if you're a newbie, make things easy on yourself and use 2.6. Once you've got some experience under your belt you'll be able to easily pick up 3.0.

Just understand you'll be missing some very common python libraries. You could then get involved in porting them over though and get some serious geek cred. Or you may not need them anyway...

EDIT: specifically some of the libs you mentioned. If you have time, I agree go w/ 3.0- you'll know the libs that much better as well if you help port them.