What is yakju, gn, yakjuxw, takju etc? I'm in the market of buying a Nexus 7, and these are what I understand some kind of firmware/maker identification. Can someone please explain all the different names?

Google sadly wasn't much help for me today.
For Galaxy Nexus these are different builds:


takju: devices sold through the Play Store in the US. Contains the Google Wallet aplication.
yakju: devices sold through Google outside the US.
yakjuxw: devices sold by Samsung.


If you buy yakjuxw I would recommend that you update to yakju with factory images provided by Google.

This way you will get the updates in time.

I wasn't aware that there are similar builds for the Nexus 7.