Recording and evaluating data was never as easy. A SD Card Slot, a real time clock at the I2C Bus and soldering pads for the construcion of your circuit. Additionally does the board have a 3.3 V voltage regulator so that there are no problems with SD Cards which need more performance. The SD cards have to be in FAT 16 or FAT 32 form and can be supported up to 2GB. The real time clock chip is a DS1307, to be able to uses it you need a CR1220 button cell.
We can send you the Arduino Lib for the SD card slot and the real time clock happily via e-mail.