Blackmesa Source: (No, still not yet, but close!)

[Neophyte]

http://www.blackmesasource.com/

They have a new media / trailer on their website, posted on Nov 30th, 2008. It's about 100 MB, and it's taking me a while to download it. The site has a little note with the URL's that concludes: "...the days this mod stays in development are truly numbered. Hang tight, because at long last, it is coming."