My theory on why the iPad 2 can't be pre-ordered on the web

Last year, when the first iPad was launched, I predicted that the lines on launch day at Apple stores wouldn’t be as crazy as those for a typical iPhone launch. One of the major reasons for this was that Apple was allowing people to pre-order an iPad for a guaranteed launch-day delivery to your house. Why wait in line when you can just wait for the FedEx guy from your couch? And if you didn’t trust that day-one delivery promise, you could also reserve an iPad for pickup…