Have you guys seen Google Earth? I highly recommend it. The detail is so good you can actually see features/contours of the land as well as the density (and sometimes) what kind of vegetation there is in a given area. Twice now, I've looked carefully at an area on Google Earth for features that I thought would hold the sort of big game I was planning to hunt and both times I found animals in the area I had previously scouted. Maybe I should call it "e-scouting".
There's no doubt that nothing on the computer will ever come near replacing getting your feet on the ground in a new area, but I think it's actually better than topo maps, personally. I highly recommend checking it out. It has helped me narrow some places down.