I have trouble setting up with red5 flashphone from the google project site below.
http://code.google.com/p/red5phone/
You will be provided with Red5 server and SIP account.
There are other solutions.
http://code.google.com/p/siprtmp/
http://tringme.com/ (phpvoice)
http://flashphoner.com/ (sipviartmp)
The task is easy-medium level of difficulty. People who have deployed RTMP/SIP gateways in the past are preferred.
More opportunities available if this project goes well.
