Looks like the makers of the BeagleBoard are refreshing their MinnowBoard (also a fully open hardware platform). At this $99 price and with these specs, this could be a perfect drop-in for a well-powered PIAF server. Looks like it's powerful enough that it could be used as a low-cost computer, or as an embedded hardware device, either way:
http://hardware.slashdot.org/story/...wboard-baytrail-cpu-nearly-halves-price-to-99
http://hardware.slashdot.org/story/...wboard-baytrail-cpu-nearly-halves-price-to-99
"The MinnowBoard Max, which will ship in Q3 starting at $99, blows past the original MinnowBoard (Slashdot video) on price, performance, and energy consumption. The 3.9 x 2.9-inch Max's $99 starting price includes a 64-bit 1.46GHz Intel Atom E3815 (Bay Trail-T) CPU, 1GB RAM and 8GB SPI flash, and coastline ports for MicroSD, Micro-HDMI, GbE, dual USB, and SATA. Unlike the original MinnowBoard, the Max provides two expansion connectors: a low-speed header, with signals similar to the Arduino's Shield connector; and a high-speed connector, which can support mSATA and mini-PCIe sockets on expansion modules, among other interfaces. Although the Max's design supports CPUs up to Intel's quad-core 1.91GHz (10W TDP) E3845, only two choices shown initially at MinnowBoard.org, with the higher-end $129 model stepping up to a 1.33GHz dual-core E3825 plus 2GB RAM.."