I was able to get Videocenter working today w/ MPlayer, so I thought I'd start a thread where users could share their list of services.

currently, I have the following subscribed:

Tekzilla
http://revision3.com/tekzilla/feed/xvid-small

DL.tv
http://rssnewsapps.ziffdavis.com/aud.../DLTV.xvid.xml

Webb Alert (although this one stutters and sputters ALOT)
http://feeds.feedburner.com/webbalert

Rocketboom and Podshow (default on Videocenter)

JetSet
http://feeds.feedburner.com/jetsetshow-psp

The Linux Action Show! (audio)
http://feeds.feedburner.com/TheLinuxActionShowOGG

I'll edit and update as I add more.

What's on yours?