wheel - 4:38 pm on Sep 6, 2011 (gmt 0)

Country IP it has a small importance, I would maintain the script on a US server if your audience is from US/com.

Whoa, are you sure? I'd say it's got *at least* a medium importance, particularly for ranking in the serps for a country.

If you want to rank in the US, better host there. if you want to rank in the UK, host in the UK.