It looks like I'll have a reason to get back into Team Fortress 2 next week: the official Scout update is nearly here! So far, Valve has released information on the following:

• The Sandman: A replacement weapon for the baseball bat that allows you to stun your opponents.
• Two new community maps (arena_watchtower and cp_junction)
• Energy drink (though I'm not sure which weapon this replaces; maybe the pistol?) and a list of the new achievements.
• Two more community maps (cp_egypt and an update to cp_fastlane)

There are still two days of updates left to be unveiled. One of them, if I recall correctly, is a new payload map, and the other is undoubtedly the new primary unlockable weapon (replacing the scatter gun). Very exciting!