Microsoft unveiled <A HREF="http://news.zdnet.com/2100-1040_22-5516647.html?tag=zdnn.alert">a new video download service</A> at this week's Consumer Electronics Show. The service is meant to boost the slowly growing line of portable video players based on its nascent Portable Media Center software. Microsoft's MSN Video Downloads will offer a daily changing selection of video clips from sources such as Fox Sports and IFilm.