Undoubtedly.
(I've been rereading the entire Discworld series in order. I am shocked to realise what a startlingly intelligent and clueful man Terry Pratchett is, and his rationalist heroes are pretty amazing too: yer Granny Weatherwax and Havelock Vetinari. Even Vimes, as he slowly, painfully learns to think. Pratchett doesn't give much of how they do what they do to make them required reading, but noting that they are in fact rationalist heroes is IMO useful.)
On Sunday, January 2nd 2011 there will be a meetup the London area. As with previous meetups, the venue is Shakespeare's Head. The meeting will start at 14:00.
In order to keep us organised for 2011, I'm putting together a mailing list for LWers around the London area. If you'd like to be added to the list, please send me your e-mail address via private message.