I looked at Google Earth yesterday. Fancy interface, but other
than color, I prefer the Terra Server photos for the detail - even if
it is B&W.

Even better, for MN anyway, is Geo Express View pgm using MN DNR's
"NAIP" series of photos (on a county by county basis). The entire
state available in something called MrSid format - uff-da - talk about
detail - it doesn't get fuzzy until you try to zoom in beyond
1M/pixel. You can see the differances in water depth on some of
the lakes. Great for scouting land from the air for hunting.

Jim