Since the Official HTC Froyo is, I believe, European in origin it doesn't have U.S. English as a language. I am pretty sure that is why I cannot get Voice Actions to work on my phone. Oh well, that is a small price to pay for having Froyo ahead of the official Telus release in Canada.
Incidentally, it is the description of the application in the Market which indicates it doesn't support any language other than U.S. English.
Incidentally, it is the description of the application in the Market which indicates it doesn't support any language other than U.S. English.

