Rio Grande Games, a company which is based in America, and provides many European games in English language versions, available in the UK.
The Games Cabinet, a great site, sadly not updated as often as it could be, that has loads of links and in depth articles about the gaming hobby, as well as many translations of foreign rules.
Dice 'n' Duel, my local games shop with an outstanding selection of games, and very nice blokes working there too!
Thatchmeet, my local games group in Exeter. Come along if you are interested and in the area!
Reiner Knizia, a brilliant, and prodigious, games designer, is too modest to run this site himself, but you can check him and his games out here, thanks to Chris Lawson.
Greg Costikyan seems to have a lot to say here.