Hi,
I have added few lines to dvb-usb-ids.h and ttusb2.c to get the 
Technotrend TT connect S-2400 working.
The attached patch should apply against current HG repository.

However, the S-2400 will not be working unless an earlier patch is reverted:
http://linuxtv.org/hg/v4l-dvb/diff/816f256c2973/linux/drivers/media/dvb/frontends/tda10086.c

There is an ongoing thread in the list about the tuning problem.
See: "TDA10086 with Pinnacle 400e tuning broken"

Please try the attached patch and let me know whether it's working or not.

André