It does so affect Nokia...business and professional users are the same as any other consumers in this country. They buy their service from a carrier and the carrier gives them the device too. My company isn't looking as Blackberry Curve versus Bold versus E71 versus Treo...they're looking at AT&T versus Verizon, and then asking "OK, what kind of devices do you have?"
Nokia needs to get carriers (at least AT&T and T-Mobile) to start carrying their devices and get that relationship going in order to make serious inroads into the US market.
Having said that, I personally will go seek out the E71 wherever I can get it and obtain it, so long as it has A2DP. Any device I get MUST have A2DP though...