I've added a table to the Accommodation page so people can express their preference for location (hotel, hostel, etc.)/type of room (double, single, shared, etc.) and give dates.

http://wiki.maemo.org/Maemo_Summit_2009/Accommodation

Not sure it's of much use, but I imagine we'll need to know numbers and names at some point, and it can eventually morph into a list of the actual locations people are staying so late-comers/non-sponsored attendees can choose their accommodation to match with other people too.