L4 come together at 21C3 in Berlin?

Hi, I just browsed through the 21C3 conference program - http://www.ccc.de/congress/2004/fahrplan-preview/fahrplan.html - and saw that at least some of the people involved in L4 development will be in Berlin (and, the better, give interesting talks). So, this is a good excuse to attend 21C3 (and let the University pay for it :-)) - are there eventually more L4 hackers attending the congress? Perhaps we could organize something like a BoF session... Btw., does anyone have a proposal for an inexpensive place to stay in Berlin from the 27th to the 30th of December? regards, Michael