You can buy the product hardware here:

http://www.atupapa.com/17043400030en.html

It's currently listed on Ali Express (NEXX WT3020) [1]. Can't vouch for if it would arrive or not.

[1] http://www.aliexpress.com/store/product/Brand-Original-WT320...

Board and case: http://www.aliexpress.com/item/New-2014-300Mbps-WT3020A-Mult...

I've been buying a lot of the GL-iNet routers with either 8 or 16M flash; they run OpenWRT out of the box. Awesome little systems.

http://www.gl-inet.com/w/?lang=en

This page says Gainstrong: http://www.wired.com/2014/10/tiny-box-can-anonymize-everythi...

Better advice is to use the grugq's PORTAL: https://github.com/grugq/portal

Seems really interesting, but I can't think of any good use cases. Care to share some? I'm lacking creativity.