Regarding the Nvidia miner, the code (still WIP) is available here:
https://github.com/LIMXTEC/xevan_ccminer. The miner has not been compiled for windows, and requires testing by people who have Nvidia graphic cards.
I honestly don't know where to even begin to compile it, but if anyone has a pre-compiled version to share I can test it on Windows and report bugs and results. Alternately if anyone can point me to a thorough and detailed guide I'm willing to try compiling it.