Finally, just a heads up - there have been reports of wireless communication antennas/meters showing up on people's propane tanks in Massachusetts, New Hampshire, and Virginia. The companies seem to be obliging when a request is made to take them off, however they don't seem to know much about these devices when asked (as far as how often they pulse, how much radiation, etc.).
Please let us know if you have any information or experience with these devices on your propane tank. We'd like to get ahead of this!