Two posts rolled in to one, to annoy the aggregators a bit less (sorry haskellers, more haskell stuff soon).
First, dorkcamp is a lovely event in its third year. The idea is for around 60 of us to go to a campsite an hour out of London, well equipped with showers, toilets, a big kitchen and hall, and do fun dorky stuff like soldering and knitting. It happens at the end of August, tickets are running low so grab yours now. More info on the website and wiki.
Second here’s a new demo, this time with two drum simulations, one high and one low: