The questions is: what proportion of all iPads sold have been 3G versions? My unscientific observation is that the vast majority of iPads are WiFi-only. This s

The questions is: what proportion of all iPads sold have been 3G versions? My unscientific observation is that the vast majority of iPads are WiFi-only. This suggests that most consumers don't actually want a cell-network-enabled tablet, and would rather keep the money. So really it's $500 vs. $699 + features the customer likely doesn't even want. That's a tough sell.