I am now smelling the flowery smell of #! Linux on my netbook, because running JRuby on Windows sucks monkey arses.
Actually, if anybody's looking for a really lightweight distro, #! is worth a look. It's a stripped-down and optimized version of Ubuntu 9.04, and very minimalist in a Zen sort of way. No start menu or anything.
Given up on JRuby for the time being. It's much easier to get apps running on AppEngine if you write them in Python. But the experiment with JRuby did get me back in vi, which I count as a good thing.
Anybody used Django for anything substantial?