Driving in the snow today (Tahoe), I began to think about siping and whether anyone has tried it on their s2000 tires, So many threads are about skidding, sliding, tire wear, etc...

Siping has been shown to INCREASE tire life and traction. Tire life is improved by better heat dissipation (maybe a BAD thing for the 2000?) and traction by more gripping ridges. I have sipped snowtires on my pickup, and can tell a big difference. You must have it done when the tires are new, however. Many newer snowtire designs are now essentially "siped." Most of the snowplow operators up here use siped tires.

I read gregstephens thread about siping, and wondered what the experts on the board think of the idea, or if it has been tried?

 

...driving a Tahoe, not in Tahoe...

 

If you mean siping a stock S02, it's probably not a good idea - more tread squirm will lead to higher temps - not lower. If you get winter tires, they are inherently highly siped to create an effect of lots of "biting" edges for ice crip.