codehaus04 is a dedicated build machine hosting both Bamboo and Hudson
Raise a JIRA / email support to get access to the build machine. We only offer access via the CI tools (i.e. no shell access).
Hudson vs. Bamboo
Bamboo has prettier graphs; but some of us like to support opensource / find Hudson more flexible and extensible.
It's your choice.
Hudson isn't quite ready for prime time yet