I'm in Uppsala, close to Stockholm. Not sure on my travel options/interest though, I guess I'd like first to read some 'reports' about what LW meetups are like.

I'm moderately sleep-deprived now so the following may or may not be a sensible observation: do not discount slightly out-of-the-way locations for the possible meeting place. London/Paris/Rome/Berlin are heavenly, but (1) everybody's been there before and (2) they are relatively expensive. Smaller capitals like Budapest, Lisbon or Dublin are still full of low-cost flight connections, but they are cheaper and, despite them having a ton to offer, people are less likely to have seen them already.