Roll your own podcast feed
Soul train by Go-tea 郭天 (cc by)
If you haven't seen it yet, check out Iridic's post on Fourble: Point it at some audio files hosted anywhere online, and it'll turn them into a podcast feed.
Highlighting the best bits from the MetaFilter universe
MetaFilter started as a community weblog in 1999, later added question and answers, then music by members, jobs, projects by members, a podcast, and finally an area dedicated to meetups.
