"Aard Dictionary is a multiplatform dictionary and offline Wikipedia reader. It runs on desktop computers, notebooks and netbooks with Windows, Linux and Mac OS X as well as Nokia Internet Tablets (N800 and N810) and anywhere Python, PyGTK and ICU are available. Aard Dictionary is light, fast, easy to use and free."
And now it's also possible to read Hitchwiki articles everywhere: I converted Hitchwiki dumps into .aar files.
I'll probably set up a weekly cron on my server once I have aarddict running on the N900 that I received from Nokia during the Maemo conference in Amsterdam 3 weeks ago :)