Polsktronika

                                                 if you've got a spare 5 hours

A different avant-Pole - Boguslaw Schaeffer -was reworked by Matmos last year in this cool project 

A not-really-a-sequel is soon-come from Matmos - it does similar thing to the Folkways archive (not the electronic avant-stuff though, more the science and nature sounds recordings)

Bit more Rudnik

bonus Polonotrica