Those look great. What are they for?
E: just realised you got asked this in the other thread. I like this thread though.
It says Small Mesh Sensor Board. Must be for some research, though I'm not sure exactly what the test method is or what equipment this would pair with. Cool stuff though, building a custom board for a research group. 
I'll post an explanation here with a little more detail than the Mail Show and Tell thread.
These are the communication and control boards for a mesh networked sensor array. About 130 sensors are going to put out into the middle of nowhere - a drilling site in the panhandle of Texas. The sensors are going to detect CO_2, CH_4, p, t, and Rh. There is also going to be a sensor unit in a UAV that will patrol the skies above. The sensors will all communicate with each other in an XBee mesh network. The sensors will coordinate data packets and send them to a home base through a cell phone network. At the home computer, we can make neat 2D graphs of the data collected in real time (3D if we incorporate the UAV data). The point of the sensor is to detect and track gas leaks as they form plumes and blow away. Hopefully, at the real world field site, we won't detect anything, because the area we are monitoring is used to store excess CO_2. A plume would cause a cloud-kill effect. But while we are testing the sensors, we can do all sorts of fun things with tracking clouds. That isn't my part of the project, but it will be neat.
So this board is the command board. An ATmega 2560 controls all the things happening. There is an XBee modem slot as well for the communication. The board has several power converter circuits, since our solar power will come in at 12 V, but we need to supply 3.3 V, 4 V, 5 V, higher current 5 V, and 12 V to various parts of the sensors and components. The board has a real time clock, external oscillator, SPI, ICSP, 11 monitoring A/D inputs, a pot. to adjust a pump, 1024 kb serial eeprom, and an (Alps) SD card interface. Everything else is wiring for the sensors house on a breakout board connected at the 20 pin header (I've posted it here before, it has the 3D printed crap on it) which routes through some level translators.
I'm currently writing the section of my dissertation on the design and construction of this board, so I could go on for ages. The schematic description alone is 9 pages already. This has been a huge ****ing project, especially since going into it I didn't know anything about circuits, CAD, or 3D printing - yet now I am competent. Trial by fire indeed.
