Plugins for custom fields at registration? Suggestions please?

Hello,

I would like two different register a site / register a user type forms.

User isnt really that much info needed. Pick a name, and pick a PW (or Register with Facebook) but most importnantly pick a PW, then be dumped into Site Registration step (no confirm).

I was thinking of just creating an api to do this, but you people always have such wonderful plugins, so I thought I would ask

Side note, anything allowing custom fields during site registration?