Lantronix Xport AR

[Arclight]

Also, I know various embedded designs here have been using the Wiznet
boards or the Xport modules from Lantronix. We just ordered a
Lantronix Xport AR, and it looks pretty good. It has a built in web
client/server, and supports ssl, ssh, smtp and a bunch of other stuff.
It also adds PoE capability. The only drawback is the price (about US
$65 per unit.)

Check out:

http://www.lantronix.com/device-networking/embedded-device-servers/xport-ar.html

http://www.mouser.com/catalogviewer.aspx?page=45

Arclight
http://shop.23b.org

[Rhys Rhaven]

Just as another vendor that has embedded linux serial servers for
hooking to lots of serial devices:

http://www.opengear.com/products_serial_device_servers.html

Big fan of these guys at work (SysAdmin)