For those too lazy to go to the link....
Pretty nice, though there have actually been lots of folks that have made their own guesses what various terraformed worlds would look like. I was going to directly put their images in, but they're gigantic, so I'll just post the link myself.
http://en.wikipedia.org/wiki/Terraforming
Just a shame that terraforming Mars is essentially impossible given the fact that it doesn't have an active magnetic core necessary to sustain a lasting atmosphere suitable for humans..
