Yeah, you're not going to beat that iPhone 4 battery. It's a beast. It'd be nice if carriers like Samsung would up themselves to 1800mAh. With the battery saving you see in an AMOLED screen, it could well top the iPhone 4 by leagues.
In any case, there are some thigns you can do to improve the battery life. Turn on medium brightness, keep wi-fi off unless you're actually using it, keep your background black (White light consumes something like three times the power), turn off location services, turn off "Find my phone", and turn off Feedback. Also, turn your e-mail on to that mode where it only grabs them when you request them.
Once I did all those things, I noticed a significant jump in battery life. Once the phone isn't constantly pinging a number of assorted services for data, it's life improves a great deal. I can easily cruise through a day's use, or more, on my Focus. I only typically need to charge it midway through the day if I've had a marathon, two hour gaming session or something.