As most people already have access to the Internet both at work and home, the high-speed aspect of 3G is important for those who, between work and home aren't at Starbucks or an airport all the time and that don't have an opened Wi-Fi network nearby and/or don't want to pay for spot Wi-Fi access.Plus I get WIFI which is awesome since I have wifi at home and work and don't have to use stinking Cingulars slow 3G network, plus I can go to any starbucks or airport and connect. Wifi is 10x more important then 3G
The poor quality of 3G offerings in the US is a US-specific problem. In Europe 3G coverage in quite excellent and you can get unlimited bandwidth access at a reasonable cost. I have been using Google Maps (along with TomTom and a Bluetooth GPS) and Gmail for Symbian 3rd edition for a while and 3G data rates helps a lot.