Yesterday, the Team Fortress 2 official blog provides a page that will be updated daily to show off the new Scout features that will be included in the next achievement pack. So far, they give details on the new Scout weapon, The Sandman. They start with the following description:

You Scouts are gonna love this highly collectible bat that smacks baseballs at the other team, stunning the living crap outta anybody dumb, slow, drunk, mute or Australian enough to get in the way.

They also provide some clarification on the last update that changed the damage to sticky bombs.