Great work! I just tested with my account and it found my account's estimated value in less than 15 seconds. I do have one suggestion regarding the ads. The top banner ad looks a little out of place, maybe if you centered it that would make it look a little better?

But overall great work, the only other thing maybe worth tweaking a little bit is the formula for finding the account value, it estimated that my account is worth ~ 0.12 BTC. I'd estimate that it would actually be worth 0.07 BTC or so at most, since Senior Member accounts seem to be selling for fairly cheap here now ( < 0.2 BTC).