Just fired this up and immediately subscribed to the unstable update path. Very first thing I did was check the temp probes. Probe 1 was reading 7.7 degrees F high. Backed it off in an ice bath and am very happy. Calibrating probe 2 now.
I agree that an ABV setting/probe would be nice. Thanks gents this is excellent so far.
Edit: Just set probe 2. Off by 4.9 degrees F. I agree with the poster that suggested this. With out accurate temp reading and calibration this would have been far less useful. Obviously a feature to add will be to have a button that says calibrate probes. Push the button, insert probe into ice bath. Record for two minutes and automatically apply the offset. Fairly trivial bit of code I would imagine.