Good news today for people who like to use FriendFeed from the comfort of their favorite desktop or mobile client (like twhirl or Alert Thingy)... we've added to our API the ability to subscribe and unsubscribe from friends and rooms.
This means no more having to remember interesting people or rooms you want to add the next time you're on friendfeed.com. Instead, API clients can now support subscribing directly.
Every time you subscribe or unsubscribe from a person or room, a new entry will show up in your subscription modifications page so you can undo any mistakes.
Full technical details about this and other features can be found in the API's documentation: http://code.google.com/p/friendfeed-api/wiki/ApiDocumentation
This was one of the most-requested API features in our developer forum. As always, please swing by with comments, concerns, and suggestions about existing and future API features: http://groups.google.com/group/friendfeed-api