Try Chirpscreen today for personalized content channels, including:
Friend Channel: Your friends' latest photos and messages from Flickr, Facebook and Twitter
Photo Channel: Public photos from Flickr on any topic: celebrities, cities, you name it!
Shopping Channel: Live eBay auctions of items you are interested in
...and much more coming soon!
Note: the Windows version includes the screen saver and the desktop Viewer; the Mac version includes the desktop viewer only.