VoodooExtreme has reported this:
Afsfasfabut it was from a source who has not been wrong -- yet. Anyways, the person, who works very closely with the development team/testing team behind the Half-Life patch, has learned that there is a very good chance that the patch, Team Fortress 1.5, and OpFor CTF will be out at 6:30 PM PST tonight. As we have seen before, this may change, but he is a very, very good source and it has a good chance of being true.