Urgh. Woke up at 00:30 to find my entire basement in 10cm of water. Spent the rest of the night shovelling it back where it came from. Now I need to dry the place out, and get an overview of the damage, which will mostly be soggy cardboard boxes with old books and memorabilia. Of the computing equipment, at least one PC and a 17" monitor was standing on the floor as well. The crucial stuff (my development server and the server running my mailinglists etc) are ok - they were 1m off of the floor.
Note to self: next time, get a 3rd floor apartment instead of a house with a basement.