will work for doughnuts

Created by one of our users, this Pipe creates a feed of your Flickr Contacts’ favorite photos. (Here, I’m viewing the output in Google Reader)
He’s posted it here in the Flickr Hacks Group. This is an excellent Pipe to look at for advanced users combining Split, For Each, Regex and Sub Pipes to create the end result. He also makes great use of the Prompt fields in the user inputs of the Sub Pipes to create a readable interface in the primary Pipe.