Please take a look at MediaScripts Social Media. It may suit your needs: http://forums.digitalpoint.com/showthread.php?t=975423
I use CirtexHosting as they have PHPmotion (www.phpmotion.com) as part of their cpanel (auto-install) - it works fantastic and is cheap too! My site using the above can be found at www.vdo.me. I've added the Youtube grabber mod and bought a premium template too.