Doesn't look to me like your /etc/resolv.conf file was loaded properly.. I don't see your nameservers in there.
Assuming that you can ping out on the Internet via IP (That is, use 74.125.140.102 to ping or connect to Google),
I think I would try editing that file (as su) and adding:
nameserver A.B.C.z
nameserver 8.8.8.8
It will get overwritten the next time you start up but that will let you test.
Mine looks like this:
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# OpenDNS Fallback (configured by Linux Mint in /etc/resolvconf/resolv.conf.d/tail).
nameserver 208.67.222.222
nameserver 208.67.220.220
Lou