At the end of the day Dec 7, 2010: 1 US dollar = 0.6293 UK Pounds. Currency conversions vary on a continual basis. I refer you to the tool on ConvertWorld.com which has a currency converter which is...
$1 (USD) = 0.6541 British Pounds Sterling. This exchange rate can (and does) fluctuate almost daily. Always check with your local financial institution for the latest rates.