The iPad's model number of A1219 is interesting.

A1219 falls right between the 1st Gen iPod Touch (A1213) and the MacBook Pro 15" Santa Rosa (A1226).

We would have expected the iPad to have a model number in the A13XX range, not A12XX. It's a little tricky to read into this, but our guess: This is indicative of a longer than typical development cycle.

According to the FCC filing, the version that includes 3G is model A1337. Is Apple having fun with their model numbers?