When you have a super successful device that's on the bleeding edge of technology, you might expect some headaches in meeting demand. Apple anticipated this and really did as well as they could to have as many iPads available on launch day as possible. Demand however was still impossible to meet and it seems Apple is still scurrying to keep up with demand.
They've upped their manufacturing quotas and are now producing 2,000,000 iPads per month according to Katy Huberty an analyst at Morgan Stanley.
This increase amounts to doubling the production numbers and should go a long way into making sure that there are plenty of iPads in stock and available. This has had the effect of lowering shipping times of iPads from 7 to 10 days to just a hair over 24 hours for online orders from Apple.com.