The ALT.NET Open Space Conference is now open for registration, so you should register yourself (free) as soon as possible, only 100 people can fit in.. the rest get into a waiting list.
I'll personally be there, and so will some of my favorite people to talk to, plus some semi vertical celebrities like James Newkirk ( The artist previously known as the maintainer of NUnit), Martin Fowler (needs no introduction..) and others. Should be fun!