Adding a little "Help" hover button next to each field would be nice. A lot of people seem to confuse what "Bitcointalk ID" means. There should be a help button that explains exactly what the ID is and where to find it.

Also, the user's Bitcoin Talk ID number should be automatically injected into the footer code for them, so that they don't have to manually replace the XXXX, which also seems to be a problem for many to understand.

Sorry if any of this was already added, I haven't checked the registration process in a while.