It looks like CinemaNow could be heading over to the UK fairly soon. The US website is currently in the process of setting up a UK distribution channel, a move that will make all the Digital Video Player manufacturers very happy indeed.
CinemaNow provides an online download service for movies. It holds the Internet distribution rights to over 4,200 feature length films, shorts, music concerts and TV shows, licensed from the likes of 20th Century Fox, Disney, MGM, Miramax and Warner Bros. A UK channel would certainly improve the chances of Windows Portable Media Center-based devices succeeding over here.
The service allows you to buy or rent videos (with the option of a subscription service or pay-per-view) direct from the website. You can then either stream the videos or download them to your computer. The service uses Windows Media Player.