Make Pt0138
David writes –

I thought you guys might be interested in putting up some balloons or kites and adding some open-source aerial data. You may also want to have a look at openstreetmap.org (which can overlay the aerial images) which is going to have full (10-year old) open-source/public-domain mapping coverage of the US sometime next year.

A free view of the world — OpenAerialMap – Link.