I would love to have the ability to choose whether I wanted to upload/post a photo to twitpic or ping.fm. My preference is ping.fm because with that you get more bang for your awesome.

From an integration standpoint it seems pretty straight forward (looking at pings api) and a few ping.fm air apps are taking advantage of this functionality.

If I were a betting man I'd say tighter integration with Ping.fm is coming in the future. Hopefully this is one of the next moves!

Love where Twhirl is heading with the ping.fm stuff, plz add moarrr! :-)