I had mine fully charged and let it sit on the coffee table all day yesterday. The only use was 2 calls < 10 minutes total. When I woke up this morning the battery was completely dead. I don't know exactly how long the battery lasted, because my uptime widget still has the previous record of 17hrs. It's not usually that bad, but I don't think I've ever been even close to 2 days without having to charge it.
That's with BH_MAN's latest ROM.
Now it's sitting on my table and went down 5% in 1hr15min.
Down 2% more at 2h10min
And when I wake up this morning, it's turned off.
So, that's <11hrs to go from 80% to shutting itself off, just sitting on the coffee table. Of course, the battery says it's at 63% as soon as I get it plugged in and turned on... so, who knows.