They've finally announced the D7200 (still no D400). Is it different enough, or should people be snapping up cheap D7100's? New version uses the same sensor as the D7100, but has much greater low light capability, way more shots per second, new video performance, faster processor and things like vertical focus settings and a built in time lapse and WiFi. Dimensions match the D7100, so unless they pulled a D300S (added a live view button and made the multi button taller so it didn't fit in the D300 case) maybe it will fit in the D7100 housings? Price difference compared to original D7100, pre blowout, is negligible.
Nikon D7200 Digital SLR Camera | DSLR from Nikon
Nikon D7200 Digital SLR Camera | DSLR from Nikon