Half-Life 2 on Linux?

Are we going to see Half-Life 2 run natively on Linux? Well a quick peruse of valve software's (the makers of Half-Life 2) jobs page uncovers this nugget:

"Responsibilities
...
Manage the operation of large clusters of machines running both Windows and Linux in a highly available system.
Utilize knowledge of networking technologies and their appropriate use in large scale digital distribution systems and gaming platforms.
Port Windows-based games to the Linux platform.
..."

Mmm, sounds interesting.

See the full description here: http://www.valvesoftware.com/job-SenSoftEngineer.html