Awesome. A friend of mine is thinking of switching his phone's top half as you did, could you drop me an email of the instructions, or post them here, if it's not any trouble?
I've posted the instructions several times in the past, and don't have the time to re-type them right now, so read this thread. It explains it pretty well.
I wouldn't call it difficult, but you run a serious risk of screwing your phone up beyond repair if you're not careful.
heheh i did that with my first a500 and took it to sprint,told them their firmware update they did a week ago messed it up and I got a new one sent to my house weeee