This from http://www.punkbuster.com/news.html:
Thursday 9.27.2001 [3:00PM] Since Tuesday's announcement regarding PunkBuster going commercial, we have received four inquiries from commercial game developers (including Valve) about the possibility of integrating our Anti-Cheat software technology into their products. We continue to desire relationships with game designers who are serious about stopping cheaters. We will release more details as soon as possible (hopefully, in the near future).
