Update: For the first evening, I used the heating pad for my primary fermenter... Worked like a charm. I bought a heating pad for $15 from Walgreens. It has 3 settings (lo, med, hi) and has an automatic cut off after 2 hours (pretty clutch). Before I went to bed around midnight, the fermometer read ~72* F. I turned the heating pad on medium.. when I woke up this morning, the ferm was at a stellar 70*.
I would recommend this method to anyone who has a Better Bottle or similar fermentor. I think the key is to regulate (as much as you can) with a water bath..... my water bath is in a small metal tub; the ferm is submerged half way and I wrapped it in a couple of towels. The way it is set up I have the floor, a towel, heater, water bath, ferm.. in that order from the ground up.
Works for me.. might work for you..