We have created a open-source implementation of the FrameChannel service. With FrameAlbum you can collect all your photos from around the internet and feed them into your internet enabled digital photo frame.
At present FrameAlbum supports Flickr and Picasa photo sharing services as well as weather radar feeds of US and Canada. In the near future will add Facebook photos as well as standard Media-RSS channels to your frame's feed.
We also maintain a public database of WiFi enabled photo frames that includes specifications, links to the manufactures and downloads of manuals and firmware updates. You can access this free database at wiki.framealbum.com