Android development on Apple's hardware stalled out long ago, due to the fairly different SOC and related parts. The community never stepped up to write the proper drivers. I've got an initial iPhone with the latest community Android release, 2.2, and still no power management at all. Battery will last all of 30 minutes booted into it. I don't think they got past the 3GS for anything basic.

Makes sense in a way, why bother trying to do all the really hard driver development when there is a ton of Android hardware to pick from.

The HP Touchpad used a lot of similar hardware to other Android products, and HP even released some of their work from running Android internally on the hardware.