Windows Azure

Cloud Call Me Facebook App by Dennis Palmer

is a Facebook application for calling your Facebook friends with the
click of a button.  Using it is simple, just add the app and configure
your phone number.  Any friends who also have the application will be
listed, and you can simply click "Call" to be connected to them. 
Dennis coded right up until the contest deadline with the (very vocal)
support of his wife.  You can find Dennis on Twitter @CoderDennis

Try CloudCallMe now