Yes, same here - I need to pronounce certain things in an American fashion to be understood at all when at work in the US. And much like this example, it revolves around the 'r':

'Excuse me, do you have you wireless internet access here?' (pronouncing it British / Australian style as a two syllable word)

'Sorry sir?'

'Excuse me, do you have you wireless internet here?'

'I'm sorry I don't understand'

'Do you have you wiYERless internet here?'

'Yes Sir, we do have wiYERless. Here's an access card...'