small device with IP address

[Mikael Abrahamsson <swmike () swm pp se>]

Does anyone know if there is a device somewhere that is small, cheap, has
1 10mbit (or 100mbit) ethernet port and a small IP stack that enable you
to set ip address and default gateway on it (dhcp perhaps?).

I would like to put something like this at some customers to use for
pinging to see that the customer is reachable. Cost should preferrably be
in the $50-$100 range.

-- 
Mikael Abrahamsson    email: swmike () swm pp se