On the Wilderness.net site, they have a really cool map that is similar to the one used here on SP:
http://www.wilderness.net/index.cfm?fuse=NWPS
However, unlike the maps here on SP, they have a cool feature where you can switch from a simple map, satellite map or terrain map to the USGS topos. You can then scroll around and check out any part of the US with topo maps.
Is there anyway that SP can get this feature? I know it would only be for the US, but it would still be a really cool feature.