Recently I bought some PogoPlug Mobile and flashed OpenWRT on it... It's works very well so far.
- CPU: Marvell 800mhz
- FLASH: 128MB
- RAM 128MB
- very small case 10cmx11cmx4cm
- low power consumption, it comes with 12v 1A power source
- SD slot
- 1 direct? USB 2.0
- dual status led (green-red)
- 1 ethernet gigabit
- "eject" button (inner, as for "reset")
Price: bougt mine for 9 USD on Amazon some months ago, but I saw 2x listing at 14,98 USD now.
It has no Wifi but depending on your needs you could easily add a USB WiFi dongle and upgrade as needed, cheap 7 USD 2.4ghz USB WiFidongle or a much better one with dual band 2.4 and 5ghz for less than 20 USD and it usually comes with a detachable-replaceable external antenna.
There is other PogoPlug that has SATA and 2 USB 3.0, with internal USB hub, but only one of them works at 3.0 speed the other works at 2.0 as read on some website, same specs, and another one but with different case has internal power supply (with external power cable), and it has 3 USB 2.0 on the back and 1 USB 2.0 on the front (internal USB Hub) the later one is also very cheap...almost same price.
It is interesing to use as a OpenWrt NAS, that will my first experiment, and later I want to test the cryptographic support of the Marvell to see if speed up OpenVPN or WPA2-AES in some way...
What do you think?