How we connect Facebook to other sites?

anyone can tell me about how we connect facebook with other site like twitter, google buzz, yahoo buzz, digg, and some others

Can you elaborate the “connect” you mean? Did you mean you want to add facebook login to your site?

The question isn’t very clear.

Do you want your facebook updates to reflect at those other sites?

try Gigya…

As far as I know there is an instruction in facebook on how to connect these sites.