According to the owner's manual, my beloved 1999 Honda CR-V (which I've driven 180k miles so far) is capable of towing 2,000 lbs. I imagine that I could tow Central Air for a short distance if the terrain was perfectly flat, but I've never worked up the nerve to try this. I know for sure that if I tried to retrieve Central Air with my CR-V, Central Air would emerge the clear winner of the tug-of-war that would take place at the bottom of the ramp. The CR-V is not equipped with the 'positive buoyancy' feature that Central Air has, so that would most certainly be an unfortunate and wet lesson to learn.
I have a few months before Splash Day '09 to make a decision on this subject. I'll give some thought to what my options are for this year, with a default plan of 'continue to leech off friends with trucks.'