the only problem I had with the pool was the users who created multiple accounts. Sometimes 5 accounts each.
This is really not a pool problem but a user one! Personally I think the user signup is simple and easy. However, some boneheads cant comprehend it.
Suggestion:
I think it would be beneficial to redirect the user to the login screen with user list drop down, after the submit there username, email, and password.
Maybe even highlighting there username via a cookie as well after the redirection.
This way all they would do is enter there password. This would eliminate the step of clicking the Login link and hopefully eliminating the duplicate accounts.