This drivers will come from Sweden: Mikael Sillen, Gabriella Törnfeldt, Jan Andersson, Richard Jonsson and Stefan Törnfeldt. From Finland Pekka, Hannu, Johu, Atte and Tero will come.
Jose Mario Serra(B-52) and Gugu(Red Fox) will come from Brazil.
I think also Andy Wasserman and Jeff Mack from U.S will go to Bruhl.
I got a mail from Vlado that he and Benes and Petr Kricl will also go there.
I know that Mario Schöne will not go there(to much work).
And from Germany: Klaus Wickert, Peter & Rebecca Fröbel, Christian Zoch, Heiko Thinschmidt, Rainer Borsutzki, Werner Lange, Heinrich Post, Good Old Erich Lorenz, Roland Faix, Siegfried Glink, Ulf Edgar Pietsch. And also Manni Seifarth, Ralf Klose and Oliver from Austria. 
This drivers will go to Buena Park and Boola Bash: Brad, Iga, Bonzi, Les Wright, 2010 World Champion Filipe, Cody Bramble from Australia, Per Persson from Norsjö, Bill Skinner, Paul Beuf Pedersen from Idaho. And a lot of drivers from California.