New US visaless entry system from Monday11 January 2009
A new system for entry into the US comes into force next Monday, which will require travellers to submit electronically before their travel the information usually collected on green entry forms.
The Electronic System for Travel Authorisation (ESTA) becomes mandatory next Monday (12 January) for travellers from countries which participate in the Visa Waiver Program, which includes the UK.
Once an application is accepted, the authorisation is valid for multiple visits during a period of two years or until the approval is revoked or your passport expires.
source: Business Travel World