Present.ly is a premium micro-blogging platform that allows for file transfers and updates via IM and SMS. It's a bit like Twitter, but geared towards private productivity within smaller groups. This could be a creative collective, a sports team, a small-to-medium business, etc. There's a humorous overview embedded below, but if it sounds interesting to you, definitely check out the more practical video tours at the present.ly site.
I was reminded of Present.ly when I found an Android client in the market. I had heard the name before, but never researched it. The more I read and watch, the more I like it. It's like having a meeting in a room that people virtually pop in and out of when they have a chance, leaving behind new questions or information, including files. Pretty neat tool for the Internet-based team. There's a 60-day free trial.