I'm lazy, and like to have people find interesting blogs for me, so I grabbed rubyblogs.org a while back with the intention of running a planet instance and aggregating ruby focused blogs (which can include rails focused blogs, but has a small emphasis on the former). Anyway, time, work, etc all intervened and I wound up basically sitting on it for a while. Very embarrassing.
Along comes my friend Ian making a nice aggregator app! Woot. I mention my sad tale of woe and he kindly offers to host it for me! Woot!
He and I seeded it with a couple bloggy feeds, help us lazy folks and add your feed if it's relevant :-)