TF2 To Return To Beta?
Valve have announced the new Team Fotress 2 beta: "As you've probably seen by now, we like to change things in Team Fortress 2. A lot. And while we're perfect most of the time, we occasionally get something wrong. One reason for this is we just don't get enough data from internal play testing, and another is that we spend too much time watching Tom Bui serenades on Youtube."
It seems that with the game being patched so regularly, a beta phase of the game is going to need to run, concurrent with the latest version. More info on the official blog, and forum pages here.