Here's my new pet project. I started this during the easter holidays, and this uses CUDA to squeeze up to 100%  more performance out of nVidia cards - as compared to OpenCL mining applications.  

Please carefully inspect the README.txt file before use. Usage is pretty much identical to pooler's cpuminer

cudaminer-2013-04-06.zip (952 KB)
https://mega.co.nz/#!pUIgkA5Q!Tzy1CEUdyfCOOsyRyueW4QrH6Kx-OX-loLxot_4-dcI

Let me know if this works or fails for you. Post your GPU specs and achieved kHash/sec please. Also let me know if you experience any crashes or if you have specific suggestions for improvement.

If you find this useful, please donate a little. How about the first litecoin you successfully mine with this app? LKS1WDKGED647msBQfLBHV3Ls8sveGncnm

I might be improving this a bit more during the upcoming weeks. Porting this back to Linux also shouldn't be too hard, really.

Required dependencies for building on Windows:
pthreads: http://sourceware.org/pthreads-win32/
OpenSSL-Win32: http://slproweb.com/download/Win32OpenSSL-1_0_1e.exe
curl-7.29.0: http://curl.haxx.se/download/curl-7.29.0.zip
Better build for Win32, as there is no benefit compiling a 64bit binary.

Christian