Hi,
I'm developing my web application, without entering too much in details boring you, is enough to know that is a web application when every registered users can insert his own information and the other can see it (something like a social network if you want).
I0m writing this post, because I have the idea to put away the registration form leave just the fconnect button (An user can enter by insert his own facebook credential and is authenticated by facebook). So each user will insert only supplementary information that I need to know, and I will ask later for it. Facebook return a unique id for each user, giving me the chance, in every case, to record him in my database.
Putting away the registration form, the questions are:
Can this approach have negative effect in the future ? Does exists some aspect that I'm not considering ? Can the fconnect replace 100% the registration ? All in all I would like to know pros and cons of this approach

P.S
I already took care about the impossibility to register to users that haven't got a facebook profile, but it doesen't matter if the risk is just this one, it would be interesting if you highlight something that I'm ingoring.

Thanks

Why would facebook be willing to tie up with you? Maybe I have missunderstood all these social media sites but I'm pretty sure they would want something nice brought to the table to enable that.

I don't think you understood what I mean... probably I didn't explain well. However I don't have to tie up anything with facebook, I just would replace the registration with the fconnect button. Follow this link to understand what I really mean: http://msdn.microsoft.com/en-us/windows/ee702803.aspx