Well, yesterday i've reflashed the phone with fresh PR 1.2 but nothing has change.

This is the actual configuration:
1) 3G always enabled
2) Internet connection on 3G with Skype and GTalk active
3) Foreca Widget (2 hrs refresh)
4) GMail IMAP (30 mins refresh)
5) 20 mins of phone call
6) 40 mins of bluetooth headphone connected.

Attached you can see the battery graph, i see that processor is still used all the time, despite the fact that from 10.30 to 13.30 i have all the time the screen locked.

Maybe i should try the undervolted kernel from Titan?