You can see the output for the latest 1.9.2 build here:
http://www.rubyist.net/~akr/chkbuild/debian/ruby-1.9.2/last....
All of the latest builds can be accessed here:
http://www.rubyist.net/~akr/chkbuild/debian/
I would like to see more CI machines get deployed, but I think there are a couple challenges:
1) We use custom CI software (and the docs are in Japanese): http://github.com/yugui/chkbuild
2) We have no process for people donating CPU time
I can translate the docs, but that still doesn't overcome the burden of running custom CI software. I'll email ruby-core about #2 because I'd really like to see more CI machines go up.
If there's some stumbling block to adoption, it seems that switching the single CI box to Hudson, then utilizing the numerous Hudson boxes out there as slaves is quicker than trying to get people on board with chkbuild.
That cluster drifted away, but there are a lot of Hudson servers out there that are mostly idle, and people seem generally happy to donate the CPU time. I've got an Ubuntu one here that could run Ruby slave builds.