I wish others were providing this type of data outside of the big silos as well, but it obviously needs to be much simpler.
I’m curious how you’re generating your particular feeds. For over a year now I’ve been using a simple bookmarklet system to post what I’m reading, listening to, and watching to my own website and providing it as various feeds (RSS, JSON, and a microformats-based hfeed/h-feed) for others as well as syndicating some of these to other sources. (For the RSS feeds just add /feed/ to the end of the links above. You can also chain them like so http://boffosocko.com/kind/read,listen,watch/ to get multiple feeds at once.)