I'm not one to drive my car to see how far I can really go after the feed me light comes on, but I did that with my iPhone. So for the first time, I've got a better picture of what it takes to really zap the battery.
Total stats on a full charge:
All this, and Apple says the battery should still do about 80% capacity after 400 "full" charge cycles. To me that says the battery will last as long as I have the phone, probably two to three years (unless, or I should say when, they make one that's more kick ass). The bottom line is that battery life is what it should be in the real world.