I want visitors to be able to log in with their facebook or twitter account to post a comment but not exclude the wordpress posting comment method.
This example is excactly what I am looking for: http://en.support.wordpress.com/facebook-and-twitter-comments/
The solution I used in the past was a facebook comment plugin but it ins't very good: loading a iframe, loads of w3c errors and the visitors dont have the possibility to comment without account.
Since it is a WordPress post I hope there is some more information: blogpost tutorial or smt to get this without the use of plugins. Or it have to be a good plugin what offers more populair social mediums and the normal posting with radio buttons to switch.
I hope someone can help me with this.