Today I setup a blog planet for Blue Obelisk members. First I tried Chumpologica but it did not read Atom feeds.
Next in line was Planet, which turned out to be used by many big planet sites, like Planet Debian. It also works with Atom feeds in general, but not well with Atom 1.0 feeds, like that of Carsten. After some googling I found a patched version which did the job.
The result is at http://www.woc.science.ru.nl/planetbo/, but I hope that someone can arrange a http://planet.blueobelisk.org/.