Meira and I are writing under the joint name, PeasNcarrots on ff.net. We just put up the second chapter of what will end up being a very dark and gruesome tmnt adventure.
It's called "Dead Voltage" and you can find it at:
http://www.fanfiction.net/s/2175101/1/
but yeah, if you're into horror, suspense, or action fics without extraneous love-affairs or gratuitously over-the-top original characters, you may want to check this out.
It's just the boys and their sensei: cannon characters without the extra fluff.