Usability 
Reuters has one of the best mobile news sites at mobile.reuters.com. Now there is also Reuters Labs, labs.reuters.com which has two beta mobile applications. The first is a Flash Lite enabled version of Mobile News that runs on unspecified Symbian devices with the Flash Lite player (required Flash version also not stated) installed. I haven't tried it as I don't have a compatible phone. The other beta at Reuters Labs, Mobile Videos, is pretty cool. It has a dozen news videos which are updated daily. The emphasis is on business and stocks with separate videos for the US, European and Asian markets. There are also US, European and World news videos. Each file is available in 3gpp, RealOne and Windows Media formats. I don't think any of these are actually streamable, the whole file has to download before it begins playing. The quality of the reportage, timeliness and variety of formats makes this a great site for news videos and a welcome addition to ZooVision's AP News videos.
Update: Reuters Mobile Videos is out of the labs. Links to selected videos appear on the Reuters mobile News homepage. The video home page is at /mobile.reuters.com/mobile/m/Video. Unfortunately the only format offered seems to be Windows Media! Far more devices support .3gpp than Windows Mobile Video making it a strange choice if only one format is to be supported.