We are working on some images of the screen shots. Unfortunatly, there is no good way to capture a screen shot in the air from the 720, when you have live traffic and weather available. We can do so with a PC emulator, but this is on the ground and we have very limited data on this. We'll have some better pics available soon.
As for Weather, we do not currently overlay it on the sectional at this time. It would be overlayed on the Weather Mode, this keeps it clean and un-cluttered. Weather mode is a basemap with Airports, Water features, Airspaces, Terrain, Obstructions. Complimented with the NexRad and Traffic-- it provides a great clean overall picture.
There are just so many colors on the sectional and with Terrain, NexRad and Traffic, it can get muddy. Additionally, we are working on the logic to re-project that radar data out on the sectionals. This is definitely something we are looking at more, as we also look into "stitched charts" as an option in the future. I hope this helps.