Tried it on a torrent without a valid tracker. Download worked fine although I had to start another torrent to get some peers into the host cache. I doubt a casual user would check for that, so a bootstrap system is needed. Also seeding doesn't work.
I am assuming these are both due to the the DHT support being not complete rather than actual bugs, but I thought I'd make a post to show somebody used the DHT support...
Thanks, ryo. It was a big help.