Playing around with 3G on the iPhone a bit lately (since I'm one of the lucky ones who got activated in-store) and the results are ....mixed. I've tried a few different services, each giving wildly different results within the service and between services (the above comes from http://inetworktest.com. I'm definitely on 3G here in Providence, RI, but my speed tests seem to ranging from a mediocre 140kbps up to a stupendous 420kbps. On average, well, there doesn't seem to be an average, it either comes in poorly or awesomely.
How 'bout y'all? What are you clocking in at?