Gearbox' Randy Pitchford updated his .plan (linked to Stomped while our server keeps getting hammered) with word that the Opposing Force Linux server is due to be released tomorrow, as well as some comments on the just released Win32 patches. Here is an excerpt on what to expect from the server:

The OpFor Linux server will be released tomorrow afternoon - I'll get some mirrors in place before the release.

This release includes OpFor CTF (team based multiplayer action - Black Mesa Civilians vs. the Opposing Force soldiers). It also includes the entire collection of All-Star deathmatch maps (Fun stuff from great designers including Tom "Paradox" Mustaine, David Kelvin, Eric Reuter, Marin "Kndyman" Gazzari, Rich Carlson and The Levelord).