Realistically, where would anyone get photoscenery for freeware projects? I don't know of any free source other than the ones mentioned (Virtual Earth, Google, Yahoo Maps), there's the USGS Seamless server which is really no better than the other three. I'm aware of, though have no knowledge of several places where you can secure photoimagery for a fee.
I don't know about you, but if I'm doing a freeware project, I ain't payin' for anything. I can only speak for myself of course, but if I did a freeware project that utilized satellite imagery, then it's a good bet it came from one of the three servers available through SBuilderX.:salute: