I discovered something rather interesting a couple days ago, called propnet psk. Basically, it used psk31 to beacon, looking for propagation. The way it works is a special soundcard based program is used, you set it up for the band you want to beacon on, and input info like your grid square, power, antenna height, etc. It builds a special code to let others know your operating conditions. The beacons if heard by other beacon ops gets posted automatically to a website, showing areas of propagation. Currently there is activity on 30 meters, 10 meters, 6 meters and 2 meters. 10 meters is the most popular right now, but would like to see more of this going on 2 meters.
This could be a really good indicator of 2 meter band openings if there were more operators on this mode operating on 2 meters.