Why the hell didn't I know about this [postgresql.org] before?! Right now I do some funky conversion from ipv4 -> 32 bit integer so I can do binary math for netmasks an such. I went to find a way I could store ipv6 addresses, and there's that looking me in the face.

Got to look into that more.

Functions:

http://www.postgresql.org/docs/8.0/static/functions-net.html