RE-ARM is a 100Mhz, 32-bit ARM controller with the popular Arduino MEGA footprint. It's a plug-in replacement for the Arduino Mega in your RAMPS setup for a quick and easy upgrade to 32-bit goodness.
Detailed Specs (running RAMPS)
32-bit LPC1768 ARM processor
100Mhz, 512kb Flash
mini B USB - Prototype photos shows USB B
3.3V system voltage
10-30V power supply input range, using Vin pin or barrel jack
1 Heated bed, 2 Hotend Mosfet drivers
SD card slot for firmware upgrades and config file
6 End stops, with filter and pull-ups
3 thermistor inputs
Support SPI Displays like Viki2 and mini Viki(direct) and RRD Graphic LCD(adapter)
Support for I2C and parallel character LCDs using universal adapter by Jim Morris
Header breakout for Ethernet module (RJ45) daughter board.