Kasa Chorych may be the most famous blues band in Poland, and their harp player is really good. I couldn't find anything on youtube to really do them justice of what they're up to, but here we go :
And for those of you who've already been in Poland, the "Zywiec" add will trigger sweet souvenirs... ;-)
I agree, Kasa Chorych is a great band and Micha? Kielak aka Cielak (that means The Claf :) ) is a great harper. I was hanging with guys on their appearance on one of the Irish blues festivals few years ago, and guys not only know how to play, but also how to have fun. That's great that there are good bands in my country.