Based on the DLNA / UPnP Renderer capabilities of the WD TV Live Devices, we have built a Mobile Media Center / Controller. It has Video Podcasts, YouTube, Facebook, Flickr, Picasa, etc. and it also acts as a UPnP ControlPoint for your local media servers. We named it ZappoTV and it is available for free on the App Store.
I am really looking forward to get your feedback about the functionality, performance etc.