Yeehaw! 

The new Cudaminer (18-12-2013) is amazeballs!

My GTX 660ti jumped from 208kh/s to 300 kh/s. I used the following settings:

32-bit version .bat file: cudaminer.exe -C 1 -l K14x16 -i 0 -o stratum+tcp://primary.coinhuntr.com:3333 -O username.workername:password

My OC'd card specs:
Core 1202MHz
Mem: 3247MHz
Fan Speed: 70% (Still doable)
Temps: 79C

So for anyone mining with nVidia. please make sure you update your miner!