No-one knows of their will be aircrafts in HL2's MP. HL2 has support for player controlled aircrafts so it would be kind of strange if we don't see aircrafts in MP.
There was some interview with valve some weeks ago and i know Dhabih drawed a stick man holding a crowbar for that site. So it's probably a joke or he got fired when HL2 was almost finished. :)
That Actor demo was really cool. If there will be physics like that in HL2 (and it probably will be) it will be so sweet! http://www.vividimage.co.uk/ActorDemo.htm
Download mIRC, www.mirc.com (or some other IRC client) and connect to irc.quakenet.org. (you can do that by typing "/server irc.quakenet.org" without quotes in the "status window".) And then type /join halflife2.games
Here's a url that works: http://gamefiles.blueyonder.co.uk/blueyondergames/halflife/modifications/rocketcrowbar/patches/win32/RockCrowbarV19.zip
BTW, Can't everybody that want to play meet on IRC? That will be so much easier. I'm on QuakeNet anyway.