Use e-mail as username.

I've been studying LoginToboggan and Email Registration.
I think both are great but I've read some issues with compatibility between them.\
I don't really like the auto usernaming feature and I'd rather turn off the usernames completely.
I was trying to hack the module so it used the emails as usernames with maintaining all the uniqueness checks and so.
I'll hide the usernames myself and I have other fields in the user profile for them to input their real name.
Any advice in how to hack either Email Registration or Login Toboggan to accomplish this?

Thanks!
I posted also in LogginToboggan, but I'd rather use only one module and yours looks simpler.