One way to get around 3g limitations is to get a device like the mifi from verizon which acts like a mini wifi hotspot. This way the iPad thinks its on wifi, but the data is actually coming from 3g. The downside is that it cost more for the data plan, I think like $60 a month vs the iPad 3g $30 a month plan. Also, the mifi has its own battery and you have to carry around an extra device.