Link to download servers.

Quote: The demo gives you a taste of the action in the Valley map - the same map that was used in the public beta. However, Splash Damage has said that since the multiplayer beta there has been further balance improvements made based on the feedback obtained from the beta. Gamers will be able to play online with other players and with bots. The developer also revealed that it'd be possible to fill a multiplayer server with bots to make up the numbers, too. The game's hardware requirements for the demo are pretty respectable too - you'll need a Pentium 4 2.8GHz (or equivalent), 512MB of RAM, a 128MB GeForce FX 5700 or Radeon 9700 graphics card, a DX9.0c compliant soundcard and either Windows XP or Windows Vista. For Vista, the requirements are slightly higher - you'll need a Pentium 4 3.0GHz (or equivalent) and 768MB of RAM. Owners of ATI graphics cards will want to update to the latest ATI Catalyst drivers which are, of course, available from the ATI homepage.

And it's only 372mb. Sweet!

Enjoy