The Soekris Engineering net4521 board (http://www.soekris.com/net4521.htm)
has a number of good features that we can use.

	100/133 Mhz AMD ElanSC520 
		Likley fast enough to support the switching/routing
		and reverse firewalling.

	16-64 Mbyte SDRAM, soldered on board 
		64 MB would likely be needed. (Matt, what have you found so far?)

	1 Mbit BIOS/BOOT Flash 
	CompactFLASH Type I/II socket, 8 Mbyte FLASH to 1Gbyte IBM Microdrive 
	1-2 10/100 Mbit Ethernet ports, RJ-45 
	1 Serial port, DB9. 
	Power LED, Activity LED, Error LED 
	Mini-PCI type III socket. (t.ex for optional hardware encryption.) 
	2 PC-Card/Cardbus slots, for wireless adapters 
	8 bit general purpose I/O, 14 pins header 
	Hardware watchdog 
	Board size 9.2" x 5.7" 
	Power either 5V DC fixed or 12-60V DC, max 12 Watt 
	Supports Power over Ethernet using proposed 802.3af standard 
	Operating temperature 0-60 °C