This article (linked in the title above) if for people who take their mousing seriously. Fraser Pearce tests and rates six professional mousing surfaces (seven if you include his IKEA desk) with both an optical and rolling ball mouse.

I like people who take things seriously!

If you take your typing (and RSI) seriously, the best keyboard on the planet is the Kinesis contoured range (http://www.kinesis-ergo.com/contoured.htm). I'm still saving up for mine though...