Yep, that's what we did. I pitched the idea to my husband and we decided that we'd keep our eye open for a used one. The fridge at hubby's work quit running and they were going to throw it away. So, he brought it home and 1 day later we have our incubator. I couldn't tell you what all he did to it but I have some pics! LOL! I know he wired the freezer portion to be a working outlet. It holds the thermostat and stuff. Good luck with yours!
The Freezer part:


The inside of the incubator (ignore the cord hanging down! LOL!):