I'm doing a show on 24 September with Flexo of Chrome and my man Jersch2K. It's at Tanzhaus West. It's actually a dnb event and we're in the smoking room, second floor bizness.
I agree the dubstep scene in Frankfurt itself is non existent, however I've recently played a show in Wiesbaden with Flexo, Twisted and Templer and there was about 400 people there, good vibes!
Chrome also does regular events in Darmstadt and the area surrounding Frankfurt, N-Type will be here in October. The shows have always been great! Here's their myspace:
http://www.myspace.com/chromedub
The dubstep scene (or any other halfway underground minded scene) in Mannheim is DEAD, so don't bother. There's a good show in Heidelberg though (Tiefdruck) run by my mates Norris and Speciez. It's always on the first Friday of a month.
There's a festival in Heidelberg on 28 August with me and Jersch playing as well. We're in the open air area though but we'll play some Dubstep, Breakbeat etc. Ragga Twins, Rodigan etc. in the main arena.
Dubwars in Heilbronn is also going strong but it's quite a long ride from Frankfurt. Anyway, Goth Trad played there in May, Mala will be down in October etc.
It's kinda strange, dubstep in bigger cities here is pretty dead, it all moved to smaller cities surrounding the bigger ones.
If you need any details about shows etc. get at me through myspace or shoot a pm.