The alix boards are rugged, well proven x86 based boards. Designed by the Swiss company PCEngines they have survived in community networks for years in harsh outdoor weather conditions.
There are two main lines of Alix boards: 3d* and 2d* (taken from: http://pcengines.ch/alix.htm):
name cpu RAM LAN miniPCI PCI USB other size alix2d2 LX800 256MB 2 2 0 2 tinyBIOS 6x6" (152.4mm = 6") alix2d3 LX800 256MB 3 1 0 2 tinyBIOS 6x6" alix2d13 LX800 256MB 3 1 0 2 add battery, I2C, COM2, internal USB header tinyBIOS 6x6"
alix3d2 LX800 256MB 1 2 0 2 tinyBIOS 100x160mm alix3d3 LX800 256MB 1 2 0 2 VGA, audio Award 100x160mm
There are two main differences between the 2D and 3D lines: the 2D lines are square shaped and they usually have 3 LAN ports but only 1 miniPCI slot. The 3D line has 2 miniPCI slots but only one LAN port. The 3D line fits (with some minor tweaks into a WRAP box).
OpenWRT supports Alix by default. You just have to select “Alix” during make menuconfig in the architecture options. This automatically enables the right LED drivers (the LEDs can be controlled via a device file) and some other special settings for the hardware.
Apart from this, the standard x84 OpenWRT images will run just fine on Alix.