[nadavami]

This looks almost identical (though maybe a bit more stripped down, haven't looked closely) to the Orange Pi Zero which has been on sale for a few years at a similar price.

http://www.orangepi.org/orangepizero/

[rb2k_]

This one has a gigabit port, Orange Pi Zero is just 100 MBit/s (but adds wifi). The Orange Pi also seems to be a bit more expensive (close though).

[ogre_codes]

I'm kind of curious, what would this do which actually requires GB ethernet? Seems like processing limits and SD card speed would get overwhelmed quickly.

Does this have enough HP to work as a caching proxy or mini firewall?

[rb2k_]

It has 4 Cortex-A7 cores with up to 1.2GHz. Given the kind of stuff e.g. OpenWRT usually runs on, I would say it has more than enough power.

For simple workloads (e.g. serving static files via HTTP) I'm pretty sure it could saturate a gigabit connection.

You can even find pre-made travel routers with the Allwinner H3: https://www.amazon.com/Portable-Allwinner-Quad-core-high-Per...