I've no idea why they call a GPS chip that can operate totally autonomously (no hinting or almanac download from a network) "AGPS". Maybe it makes it an easier sell to phone vendors?!

Freaky.

In general GPS has gone with 3G because 3G cell triangulation sucks due to the closed loop power control... hence why, for E911 requirements, 3G phones suddenly all grew AGPS functionality. That doesn't explain why the iPad has it with the 3G though, unless it shares the same antenna (possible, I'd have to look at the iFixit teardown in a bit over a week )