Personally I can't think of anything special, although you will want to make sure that where ever they run all the wires to that it is in a location that will get a wifi signal and that there is a power outlet as close as possible to the wires, but that is pretty typical stuff. It sounds like they will just be wiring the sensors for you and you will be left with a bundle of wires. That would be perfect for a Konnected installation.
The only other things I can think of are make sure they label each wire to save you time, and I guess if you have the option maybe look and see if you want them to run any additional wires. I am guessing they will prewire every door and window, but you may want an extra wire for an extra motion sensor, or possibly even additional doors. They will typically put sensors on any doors leaving outside of the home, but you may want to think about sensors on interior doors so that you can build custom routines in smartthings based on those doors. Granted this would be done with after market wiresless sensors, but since you have a new construction its worth thinking about.