Guaka converted the Hitchwiki database dump into the dict format. If your OS is Debianic you can try to get-apt install dictd and copy this file into /usr/share/dictd
I'm using this on my Nokia 770 myself, so I can access Hitchwiki info while on the road!
You can download it at: http://groups.google.com/group/hitchwiki/web/dict-hitchwiki.tar.bz2