It is not designed to be a “standalone” computer for running all kinds of specialized software. You plug it in to your computer, like you would your iPhone, and then sync your stuff back and forth between them.
I really do not get the need for plugging stuff into the iPad. That isn’t the point, in my opinion. People just do not understand that it isn’t comparable to a laptop or an iPhone.
The need for 3G would be very important to serious road warriors, who travel to remote areas. I suspect most people aren’t out of wifi reach on a daily basis, at least not enough to justify the extra cost.
I see a problem here.
What Apple should have made is a focused content-creation device similar to the Courier mockups, with pen-input in addition to capacitive touch.