[R] parallel R?

[Michael]

Hi all,

Lots of big IT companies are renting out their computing facilities.
Amazon has one such service. In my understanding, this will
dramatically improve the speed of my R program -- currently the cross
validation and model selection part is the bottle neck. It take a few
days to just finish optimal parameter tuning via CV.

Could anybody shed some lights on this? Is it completely transparent
to move my R program to a rented parallel computing facility?

Moreover, at my PC level, I have a 4-core PC, is there anything we
could do in R to speed up my CV programs?

Thanks a lot!