that's a thread for me i think. i've been on this sound since it started, and produced and dj'd it as dj pyro (myspace.com/pyro). not reaaally feeling all the schranzey stuff around atm tho. its a really small scene (if even that) and i think you managed to mention most of the big ones but there's also Proket, Old kemal/konflict, SPL (new album is rude), Masheen (does good stuff and his label contaminated is good as well). For labels check Venom inc (and digital venom), Contaminated, Lost Souls and older Offkey releases.
i help run www.techno-dnb.com/ which should supply you with mixes.