hello!
Yes, there are some nice productions with chipmusic based on dubstep! mainly RALP, wich has brought the spirit of massive bass lines and hard beats to the chipmusic world. Quarta 330 is also a great reference, as he remixed those tracks from Cardopusher and Kode9 (old school dubstep-not massive).
also, there are some amazing artists using game tunes as inspiration, like RUSTIE from Numbers. hes a talented guy, and his music diverges from the convencional dubstep, as a lot of artists carrying that genre does.
the "dubstep way" is known for digging hard tunes, with massive sub bass lines, usual 140/70 bpm or less , there a lot of styles, Massive is the most popular, as it drives the crowd nuts, headbanging and weird jumps with strange hand movements...
yes, it seems to be developed from d'n b, almost every dubstep liveset ends with a drum n bass track hehe its like scratching from that low bpm to a very fast takedown.
the live performance of the best dubstep artists are intense! as the music structure has more dynamics and louder tunes than the some other genres (and also cause its new stuff, hype hehe)
at my perspective, dubstep is a genre that in general, push the tunes to the edge! diferent from most IDM music, dubstep partys are made to dance, as you can also enjoy some breakdown beats and edgy synthetizing...extra subs are mandatory 
cheers!
