I think a lot of people (and businesses) don't consider them to be toys anymore because, in recent iOS updates (2.0/3.0+) Apple has started to fully embrace some Blackberry/WinMo features -- remote wipe, exchange support, etc.

Also, who really bought the first gen iPhone? The original iPhone did well, but the iPhone wasn't a blockbuster hit until the 3G/2.0 came out with the App Store and other features that had led a lot of critics to dismiss the original phone a year before that.