Perhaps you could fix the menus and make them a little more intuitive?
Once you log in, if you click "Profile" and then want to get back to your accounts, you have to click "Home" or "Blog" and then "Log In" again. The back button works, but I'd suggest a link. What about adding a persistent "Wallet" tab that has the account options within it instead of replacing the Home/Blog links? The "Contact Us" link also doesn't consistently appear, and clicking "sign out" gives an error:
The page you were looking for doesn't exist.
You may have mistyped the address or the page may have moved.
I like your email suggestion a lot. Coinapult.com and Paytunia.com just launched with this type of service. If you decide to implement that feature, please make sure you consider redemption options for the sender if the amounts aren't claimed after a certain time.
Also, can you add support for importing private keys using the new WIF for compressed public keys?
Great site, thanks for your work.