Great idea. We actually thought about doing this a couple years ago.
Our idea was to offer people a standalone box or a free software package that they could just run in the background on their computer (since we are programmers). The box/software would then take photos on a regular interval and send them directly to a dedicated area on this site.
The box idea involved a waterproof box with a glass dome with a camera mounted inside. Just plug in power (low voltage via a remote power supply) and an internet connection and it boots and begins taking pictures.
This would allow people to monitor the sky anywhere a box was running and to view histories online. The system could also assemble timelapse automatically for each location.
This would be pretty cool. It would be like Google Earth, but for the sky.
Here are the problems I see.
1. It would take 2 to 4 weeks to develop a simple version of the software (not that long really). The box would take a couple months to develop and would be pretty expensive because it would have to include a camera, computer, and operating system.
2. This would consume a large amount of server drive space. This amounts to a larger monthly hosting cost.
This would be something I would love to do, and I certainly could do, but I just don't know if there are enough people interested.
If this would really help solve the chemtrail problem in the long run, I'm all for it because chemtrails are killing me. They have ruined my life.
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About your questions.
The problem I see with webcams is that they don't have very good resolution. Perhaps some of the newer ones do, and if so, that would be good.
My timelapse is done with a Canon PowerShot A520 and AS650, so the resolution is pretty good and at night they are set on long exposures (15 seconds), so they can actually see the stars.
Here are a few examples:
http://www.youtube.com/user/GeoArtifacts?feature=mhumhttp://www.youtube.com/user/mmem701?feature=mhumThe A520 has a wide-angle lens which extends the view only about 30%, which helps a little.
The lens is an Opteka 52mm .45x AF Wide Angle.
