We (the people at dev4good.net) are running a unique (and very cool) developer event this year in London on the 2 & 3 July.
Basically we are getting a group of developers working on real-world problems for a few UK charities, you get a weekend to build and show off you solution to everyone.
Its a fly by the seat of your pants event, with sleep being optional.

Microsoft are sponsoring us and are also giving us a Kinect to give away, plus some other cool hardware.
The event is free and all we need is you and your skills.

Registration is easy, head over to http://www.dev4good.net site to register and find out more about this awesome event.