I have these files on my repository and a couple of other ruby bindings that I think were downloaded from maemo.rubyx.co.uk before it went down..

Repository details - address: http://gplsystems.com/apt - components: main

There are ruby1.8-xml and ruby1.8-sdl that I didnt see hosted anywhere else, maybe someone will find those useful.

http://gplsystems.com/apt/pool/main/....1-1_armel.deb
http://gplsystems.com/apt/pool/main/....0-1_armel.deb