Also added the PyCon 2011 WSGI panel, because the URL was lying around.
This page really needs some attention, I'm pretty sure there have been more WSGI-related presentations than these 4.
Port the 'presentations about wsgi page'
Slides for Ben Bangert's 2006 TechTalk apparently are not available anymore, link was dead
Add a WSGI panel from PyCon 2011, just because I have it right there