configuring OAuth ( Facebook, Yahoo, Gmail, live) with SharePoint 2010.

Guys,

i have a sharepoint 2010 server on windows 2008 hosted out side the network, i need to configure authenticatoin so that user are able to login using open auth ( Facebook, Yahoo, Gmail, live).

Can anyone shed some light as to how to what option i have to configure this, as of some light reading i did i can use windows Azure ACS or do some custom coding. Would be great if you can configure this and point me to some resources.

thanks