Create social signup page for a Webs network

We are creating a new social network site for our yacht charter business. Have been experimenting with both Ning and Webs. The latter is winning - just ! but has one MAJOR downfall. No social signup page. Their FB login only connects when a user is already signed up to the site. Otherwise, the new member has to jump all sorts of hoops to join. No good for us, we need easy, one-click signups. Facebook is our main social forum. However, we would like to have API signups for other networks too. Twitter, LinkedIn, Google, Yahoo, Live. Ning have a very neat signup page which does this already - Webs does not :< Will probably need other web / social design work in the near future also.