Integrating Facebook, Twitter, FriendFeed, Picasa and other Social Media or Networking Sites in to a website

Iam developing a website in PHP, which has to integrate facebook, twitter, friendfeed, picasa etc..

Is there a common API using which we can integrate various famous social networking sites like facebook, twitter and etc. So that If i post a comment in my site, that should be sent to all the registered social sites. That is with a single button click i want to write to my wall in facebook and tweet to my twi开发者_如何学Pythontter account.

Or should i use the social networking sites individual APIs to achieve this.

Please suggest me...

I use AddThis and am very happy with it!

http://www.addthis.com/

But with regard to sharing all at once I don't believe there is, but AddThis does centralise everything nicely making your job a little easier!

Failing that you can use this app:

http://hellotxt.com/

Looks very promising!