terrafly is good i have heard but not messed with it much. microsoft has one two but you need an address or coordinates to view either the aerials or topos. what i did when i bought the acreage was do a download of the square mile via this site, http://terraserver.homeadvisor.msn.com/address.aspx of both the topo map and the aerial photo. put em both on the wall together and you have a much better picture and idea. they are both a little dated the topo for our property dates to 85 and the aerial dates to 95 but it hasnt changed in a substantial way. hope this helps.

Hey, size may not matter but it sure IS nice!