Over the past few months I've been looking a range of video streaming and delivery methods for the project, here are a few items of note:

CDN (content delivery network)

http://www.influxis.com/

http://www.internap.com/cdn-services/deliver/streaming.html

Players

http://www.longtailvideo.com/players/jw-flv-player/

http://www.longtailvideo.com/support/tutorials/HTTP-Video-Streaming