Yes, you're right - the buildbot is down.
All I can suggest is you try at a later date.
But as a reminder to anyone else wondering the same, the Chameleon source code can always be downloaded and compiled locally by yourselves.
From OS X, open terminal, cd to a directory you want to download to and enter the following:
svn co -r HEAD http://forge.voodooprojects.org/svn/chameleon/trunk
Then as long as the Apple Developer tools have been installed, cd to the downloaded source folder and enter:
The compiled binaries will be in /sym/i386/
Some other commands available are:
EDIT: There's also a script posted here
which downloaded, compiled and put everything in a folder. Though I haven't looked at it for a while to see if it's still current.