Ask HN: Does Google make money from Android yet?

I meant to ask this question a few days ago but it seems even more pertinent in the wake of the Oracle announcement.

Pardon my naiveté but does Google make money from Android yet? I know it's supposed to be a play to keep them in the mobile ads market, but didn't they just buy a mobile ad company?

What revenue sources does Android provide and are there any figures available?

I'm thinking: - mobile ads - licensing agreements from device manufacturers (I know it's open, but I seem to remember rumours of some payments) - direct Nexus One sales