Houston Business Connections seems to be taking the Libertarian Party seriously. Check out this page, where you can leave an endorsement (didn't seem to work for me with Firefox, but it did with IE) for one of three candidates: Republican Tom DeLay, Democrat Nick Lampson or Libertarian Bob Smither.
The webpage has other cool things on it, like a tool for facial recognition of the three main Texas party chairs.
Bob Smither (site, blog) is running on constitutional integrity, while DeLay's platform seems to be based on a lack of integrity. Looks like DeLay may be about out of money, too.