Most likely there is some sort of IDE Header (Assuming that the 24X CD-ROM is an ATAPI Device).
And it looks like it runs a version of linux.
This looks like it could be most promising, considering there is no TOS, and you can set it up to use your own ISP or dsl/cable service. 56K modem and a 10/100 BaseT ethernet, 2 USB and more...
Could just grab one of these for $199+ and use it as a sole internet station for my Cable Modem.
Now the Question is. Whose going to be the first one to shell out $199.99+ for one of these in the name of Internet Appliance Hacking?