yonnermark - 1:49 am on Aug 19, 2003 (gmt 0)

several reasons (in no particular order):

1. Geo-tageting.
2. Price display (£price.co.uk and $price.com)
3. More relevent content - ie. UK customers don't need to be told about shipping my products to the states.
4. I think the "site:.co.uk" google searches will become more and more popular and I am currently missing out on those serps completely.

thanks
mark