Thanks to Martin the Fat Ninja, on AVPG Forums for this info:
SEGA will be bringing along the eagerly anticipated AvP to this year's Eurogamer Expo - http://expo.eurogamer.net.
You'll have the opportunity to try out the multiplayer portion of the game, unleashing face hugs and shoulder cannons to friends and strangers alike.
This year's expo takes place at Old Billingsgate, London on the 30th & 31st of October and The Royal Armouries in Leeds on the 27th & 28th of October. Tickets are available priced £6 per day.