I'm sure I started this off wanting to set up a perlmongers group for NW UK (Liverpool, Manchester area)... and I've ended up helping to start a Java User Group instead. (Heresy!)
Of course that's largely because I came across Liverpool resident Mark Hobson's cunning plan to set up a Java group. Somehow it seems to be easier to slipstream on the back of other people's projects than to get your own rolling. In case any one from the NW area is interested in meeting some Java geeks (and at least one Perl geek), some more details are forthcoming at http://www.symbiandiaries.com/liverpooljug/