I just took a hydro sample today of my "Hoptoberfest" and I am really happy with what it tastes like so far. I am using WY2633 (Ofest blend) and I simply have my carboy in a 18-gallon bucket swamp cooler for temp control. I just swap out two frozen 3-liter soda bottles filled with water twice a day. Water temps in the swamp cooler have gone as low as 48 and as high as 58, but for the most part I've been able to keep it between 50 and 55. I'm pretty sure the glass carboy does a decent enough job as an insulator to keep the actual temp swings inside the fermenter even smaller than that.
I know I still have a ways before the final beer is ready (and I'll be sure to share my results when it is), but so far I am shocked at how clean and "lagery" the beer tastes so far. I just thought I'd share so if anyone else out there is afraid to pull the trigger on brewing a lager because they don't have a fridge for temperature control, give it a shot.