I guess the real question is.....how to hook up a converter.
Ahhh, but of course my response would be, what do you want to hook it up to?
Here's a VERY basic breakdown of the typical connection types. I'll just cover digital, since the Analog side should be obvious:
S/PDIF:
2-channels, up to 96k 24-bit (optical - toslink)
2-channels, up to 192k 24-bit (coaxial - rca)
ADAT:
8-channels, up to 48k, 24-bit
smux II adat (2 ports) for 88 & 96k
smux IV adat (4 ports) for 176 & 192k
optical
AES/EBU:
8-channels, up to 192k, 24bit
single and double wide
xlr
Wordclock:
for synching multiple digital devices
BNC
Now, if you want to get this digital audio into a computer, there are 3 basic ways: pci card, firewire and usb. RME, Lynx and Frontier make some great pci digital interface cards. I'm not familiar with any usb or firewire boxes that strictly do interfacing. Of course, most of these types of devices do more than interface, they also do conversion, ala the firepod.