I did a comparison with m0mchil's miner and this one.  I got both to work, but they produce the same khps rate, averaging right around 21000 khps.  This is on a laptop, with an nVidia GTX 260M Hybrid SLI setup (with a GeForce 9400, but it only recognizes the GTX, latest drivers installed), running Windows 7 Ultimate.  Only difference is that there's a horrible slowdown when using the DiabloMiner, and no processes are running at 100%.  I'm not sure what it is that's bogging down the system, but it only happens when running DiabloMiner, not m0mchil's.  On a positive note, I was able to run minerd alongside DiabloMiner without any khps loss on either process.  I've toyed with with the -g -w and -f switches, but nothing really seems to help.  I suppose this particular miner isn't all that great for folks running nVidia hardware.  Unless there are some better suggestions to improve the performance of this thing... other than the usual "get an ATI/get linux" responses.