Dathan Vance Pattishall, one of the Flickr Devs, has posted the following email to the Flickr API mailing list:
We are talking about adding more API methods, maybe this would be a good thread to start a vote on what API methods flickr is missing, or what additions are desired.
I'll bring API additions up in our next ENG meeting to make a concrete roadmap of when we can get some stuff like this added to our next code releases.
Do you have any cool features that you'd like to see in the API? Join the list now and cast your vote for the chance to get them implemented (or at least on the list).