Last night, after watching Return of the King Part 2 and Kill Bill Vol. 2, I went home and finally figured out what was wrong with my DSL. It turns out that my AirPort Extreme no longer uses PPPoE. Whether this was due to their latest firmware update or a reconfiguration on SBC's side I'll never know, but I'm glad that we now have wireless in the house again.
Now comes the process of setting up and unpacking.
it's good to have in-house tech support =D