[lelandbatey]

Yep, it's right here: http://www.catwig.com/google-glass-teardown/teardown/mainboa...

Of the three largest chips, it's the furthest to the right (in case the large Texas shape didn't tip you off ;) ).

[miahi]

That's a TWL6030 power management chip, used for charging and powering the board from the battery. There are no side photos, but sometimes there is a trick you can do with the OMAP: put it under the RAM. It can provide pins for the RAM to be soldered on.

[jevinskie]

Yup, the BeagleBoards do this.

https://en.wikipedia.org/wiki/Package_on_package