MTV and Mini Media Europe, a UK MP3 player manufacturer, have created themed players. These are presumably designed to work with MTVs Urge service and since they're not showing videos any more—by The Hills was a pretty good show—they will also offer video playback.
The players will be pre-loaded with MTV content and come in South Park (a Viacom property) and Pimp My Ride versions. The PMR version holds about 1GB, include FM tuner and voice recorder, and a more advanced version has a 1.5-inch display and can play video. No pricing but it's a September launch.