Statistics PhD student Nathan VanHoudnos has an 8-core laptop, and by his own admission, takes "an almost unhealthy pleasure in pushing [his] computer to its limits". It seems like he's found an outlet for this passion with the new doSMP library included with Revolution R, that allows him to use all his processors for some gnarly simulations in R:
Actually, he's written his code to use 7 processors instead of 8: it's good practice to leave one CPU unpegged if you want to continue to use your computer interactively during the computations. See Nathan's R code at the link below.
Nathan VanHoudnos: Pegging your multicore CPU in Revolution R, Good and Bad