Quite recently I stumbled upon the concept of unconference which is kind of a triggering idea. It is a way of meeting people which share the same interest that you do, but not in the traditional organised way of a conference but more chaotic and doing/creating something together. There is no spectators on a unconference, you have to participate and be active otherwise the whole idea fails. Some examples that have come in my way of this nice kind of sharing knowledge is:
Geek Girl Meetup – yesterday in Stockholm. I wish I could have been there it sure looked fun.
Bibcamp – a lot of librarians meet in Göteborg later this spring to discuss e-publishing and web stuff.