As per information on their embassy's website in the US:
All Americans with U.S passports(Tourist Passports) valid for more than six months are welcome to enter the UAE, and no longer need to obtain a visa to enter the country if the duration of stay is less than one month. This includes US citizens with visas or entry stamps from other countries.
Last edited by BEYFlyer; Jul 18, 2011 at 3:10 am