LN2 + Mineral Oil = Overclocking PWNAGE!!
Don't get us wrong... I was fun, Just like you said, the frustration of lots of other little issues was keeping is from hitting our desired overclock. Plus it was F*in cold outside lol.
We did it at night so around 4-5AM we had pretty much given up home and started to have fun with the extra Liquid Nitrogen hehe!