Thanks, trucker! Given that it's more than likely due anyway I just ordered an O2, it's on its way.

I did pull codes last night with the magic button (it's a CA emissions car) and its throwing the following:

10 - Voltage at hot wire mass air flow sensor too high/low
20 - Speed signal not present

So I'm thinking at the very least I need to clean the MAF to try to remedy the first, no clue on the second.