Anybody have a good suggestion for social feed broadcasting tools? I've got most of my feeds (LJ, Twitter, Facebook, Wordpress blog, etc.) aggregated into Netvibes, which is nice, but having a way to post to them at the same time (with the option to only post to a subset) would be awesome. Bonus points if it's open-source and you don't need to sign up for yet another account.

There's HelloTxt, but I was wondering if there are any other options people like out there.

I'm trying to ramp up my online (and offline) social interactions to pre-thesis levels. We'll see how this goes.