Well, those 40mm fans can be purchased in dual bearing form for fairly cheap. CrazyPC
or Frozen CPU
Then add a little bling with a grill over at Directron
But, without it...I bet you can go a little further. I've noticed that the NB doesn't get hot until you use it. Meaning, I bet you can OC just as high as you can normally go, but then when you burn it in, or stress it, it gets hot and becomes a snag. So, an OC that POSTS and BOOT's normally may not be a good one if the NB isn't used yet. Just my thoughts
Thanks, but I have been stressing my NB with F@H for almost a month now with no hangups. And, much of that was in 80-85F weather. Temps are now 10-15F, or 6-8C cooler, and will be this way during fall, winter, and spring.
That's why I think I can push it further, even though I am stressing the NB with a dead fan.