The British Pound broke through the physiological barrier of $2 yesterday due to the relative strength of the British economy. For us Brits this has some advantages like cheap shopping trips to New York, and some negatives such as companies who export goods to the US will suffer due to their goods becoming more expensive to American importers.
It also affects British web publishers who earn money from American companies. Affiliate programs like Google's Adsense, Amazon Associates etc are all paid in US dollars. Some schemes have the option of holding payments, but with the weakening economy in the US this exchange rate might be with us for some time.