vlog hosting and content sites

Please add your favorites as comments and I'll list 'em.

http://www.youtube.com Has tons of content, and you can setup an account and host and share your vlogs there. No sign of feeds or RSS, but I'll look closer when I'm not at work .

Say, does anybody know if I can host a vlog somewhere, then create an XML file that points to it so I can serve it from the vlog host? I think this would only work for the single file, rather than creating a subscription for multiple vodcasts, but it could be very useful.