This deal is a discount over the carrier bundles...essentially a 3G or WiMAX router is included with the purchase of a wifi iPad.
- MiFi on AT&T ($15 for 250MB and $25 for 2GB)
- Fivespot on Verizon (month to month $20/month, 1GB)
- Overdrive on Sprint
The main advantage I see for this is that you have a MiFi hotspot you can use for your other wireless devices such as your laptop or iPod Touch.