Some more info is available about the BSWS games:
It is still possible to sign up for tournaments that haven't reached their max-players level yet:
Bluff, Bohnanza, Cartagena, Geister, Im Auktionsrausch, KuK, Manhattan, Manitou, Medina, Meuterei auf Tonga, Niagara, Steinchenschieber, TopRace, Yinsh
The signups are first come first served (once a tournament reaches its max, signup closes). You don't need the mayor to sign up for you; just go to
http://www.brettspielwelt.de/User/Turniere and log in. These tournaments are listed under "Extra Registrations". I also don't think the 3 people per city limit applies to these tournaments anymore.
There are two new tournaments: Emerald, and UKUK. Emerald replaces Dvonn, UKUK replaces Caylus. Post here if you want to sign up.
Also there is a schedule for the qualifications at
http://www.bgfan.de/bsw/BSWS/Vorkampf2007.html. Times are CET. For those in the USA, it is EDT + 5 through March 24, and EDT + 6 from March 25 on.