TubeMogul and blip.tv are both great platforms to use to distribute your video. TubeMogul allows you to distribute to many video hosting sites while blip.tv distibutes to video hosting sites and aggregators, social networks, blogs, messaging services and tv. Both platforms have entry level free services and expanded paid services.
Here's a list of sites that both platforms distribute to.
TubeMogul Distribution Sites (as of 12/5/09)
Site Name URL
Blip.tv blip.tv
Break break.com
DailyMotion dailymotion.com
eBaum's World ebaumsworld.com
Graspr graspr.com
GrindTV grindtv.com
Howcast howcast.com
i2TV tellytopia.com
Imeem imeem.com
Metacafe metacafe.com
MSN Video video.msn.com
Myspace myspace.com
Revver revver.com
Sclipo sclipo.com
sevenload sevenload.com
Streetfire streetfire.net
StupidVideos stupidvideos.com
Veoh veoh.com
videojug videojug.com
Yahoo Video video.yahoo.com
YouTube youtube.com
Viddler viddler.com
Vimeo vimeo.com
5min 5min.com
Zoopy zoopy.com
Blip.tv Distribution Sites (as of 12/5/09)
Video Sites
Flickr http://flickr.com
Internet Archive http://archive.org
Vimeo http://vimeo.com
YouTube http://youtube.com
Aggregators
iTunes
Yahoo! Video
AOL Video
Mefeedia
Blinkx
Social Networks
Facebook Feed
Delicious
MySpace
Blogs
Add One or More Blog Destinations
Messaging
Television
TiVo
Roku