Thanks for your patience, everyone.
The Linux server is now available for download. It is built from the 1.1 patch, and is network compatible with all retail UT3 clients.
We feel pretty good about this build, but it should be considered beta for now, as it hasn't had the full wrath of the Internet applied to it yet.
As the download is 1.6 gigabytes, I assume that everyone is going to saturate those servers...I can upload individual copies to those that will mirror with high bandwidth from my Chicago-based server (please email me off-list), and encourage others to post mirrors here, too.
Comments and bug reports can go to this mailing list for now; we'll move to Bugzilla if need be, later.
To install: set the download to be executable and run it; it will show the license text and then unpack itself.
Have fun!
--ryan.