Hello from London!
There is a growing scene here - the best places (online) to check out are:
www.londonfgss.com - mix of f***ngers, old-skool bike fans, commuters, geeks etc. weekly Bike polo, Monthly rides, random events..
www.movingtargetzine.com - courier (not messenger!) forum + news alleycats etc.
Cool, hope you are enjoying London - plenty of friendly people on Londonfgss just post and ye shall find..
provenrad