I have a couple of suggestions for the web interface for the thermostat:
First, I have my heater set to 68 and my AC set to 75, but it says "Low 75, High 68" which seems backward to me.
More importantly, I find the sliders for setting the temp to be very hard to use: there is no feedback on WHAT I'm setting it to, and frankly the range used (35-95) seems a bit larger than necessary (and so there is less resolution in the slider). What I would suggest is that the actual set value be displayed, perhaps just over/under the current set point, and there be +/- buttons (maybe one at each end) to go up by 1 degree (or half a degree in C, or whatever). Usually if I want to adjust the AC it is just be a couple of degrees, and that is very hard to do with the current interface.