When I worked internationally, everyone had a bank account in the USA, as set up by the company. However, in the post 9/11 clampdown, restrictions were placed on foreigners having accounts in the US and we all had our US accounts shut down in 2002.
As far as I know such offshore accounts need to be declared to Revenue and interest earned may be assessable for income tax and not just DIRT. Not 100% sure on the latter...