DotNetOpenAuth Implementation with ASP.net MVC 3.0

I'm planning to use DotNetOpenAuth(http://www.dotnetopenauth.net/) for implementing openid logging for my application.

Initially I facilitate Facebook, Google, Yahoo and Twitter open ids to log in to my web application.

Do I need to write consumers ie. google, facebook for each items or Are the开发者_开发问答re any common implementations to handle that ?

You could download the OAuth2 CTP which contains a sample project (OAuthClient) which has Facebook and Twitter implementations.