Concrete names and reason why do you think that they were innovative. You know, like for example Anti-Pop Consortium in US (the ones that recorded for very well known Warp records). They were mostly known for combining hip-hop with electronics which was pretty much avant-garde back then (late 90's). I found it weird, that u said about Polish hip-hop, that it was innovative in mid 90's, since back then, hip-hop music (and whole culture) in Poland was pretty much born and it was mostly influenced by groups like Lords of The Underground or House of Pain. First quasi hip-hop tracks was made in late 80's and there was only few groups/artists that used sampler back then (Kult, Deuer and couple others). And u could say everything about them, just not that they were innovative (or at least, not on a larger, global scale). Also I'm aware, that u might have a different view of Polish hip-hop/rap music, since u don't understand polish lirycs (if I'm wrong correct me) and you can only judge Polish rap by the instrumental/musical side of it.
...and when i go out there now i am hearing hip-hop more than i would on a night out in the uk - i am also seeing innovative and creative jamming sessions every week lead mainly by glennskii - see above link - who also lead a project called groovekojad [sp] five or so year ago..
I didn't said that Polish hip-hop scene is small or non-existent, it's just that for someone like me, who was raised on Kurtis Blow, Cool Herc, Last Poets or Todd Terry, there's not much to search for. And of course, there are few good hip-hop artists, who try to do something different, like £ona, Fisz or Afro Kolektyw, but that's a minority in a deep swamp called Polish hip-hop scene. Referring to Uk hip-hop that u mentioned before, I must admit, that I would give anything, to have our Polish Roots Manuva, Braintax, Jehst or Ty.