pick user group at registration

[biagrin]

is it possible to get a new option at registration where the new user can pick 1 of a selection of, say 4 user groups to be entered into. or to click on 1 of 4 links in the registration email to be placed into that user group?

[SunShina]

is it possible to get a new option at registration where the new user can pick 1 of a selection of, say 4 user groups to be entered into. or to click on 1 of 4 links in the registration email to be placed into that user group?
very good idea i hope some one make it :)