I guess every newer hardware should be supported. Just recalling the hardware specs:
1,0GhZ Processor
512 MB RAM
I always thought of buying those small via embedded boards:
http://www.via.com.tw/en/products/mainboards/motherboards.jsp?motherboard_id=490Seems just fitting 1,5Ghz and a maximal amount of 1G RAM.
Only drawback on those is they mostly contain only one Network interface. But I'm sure i found one with two allready attached. Else look for one with PCI slot and add a quad network if.