None that I have heard of as of yet. But there is also the supposition that the Froyo upgrade will help the battery. There have been many rumors and some possible confirmations that the battery life actually isn't necessarily the phone itself but that the internal programming on the phone is telling it that the battery is full and to stop charging when it is not. Hopefully that will be fixed. I did the radio update on mine and either I'm hallucinating or my battery has improved.
Any rom that is de-sensed seems to increase battery life. Sense seems to suck alot of juice. On cm6 iI was able to go about 2 days on a charge with moderate use. That is just emails, texting, gtalk and phone calls. Not streaming anything though.
Also the newer 2.15 radio has really helped in battery life.