ViewTi does a good job of giving you the yardages from where you are to the center of the green and to wherever you put the cursor, and, you're right, it essentially does this on Google Maps satellite view. My problem with it is that the fairway view doesn't show the tee box, and it doesn't automatically follow you around. AirVue not only gives you the yardages from where you are to the center of the green, but also to the front and the back, the landing areas (and layup areas), and wherever you put the cursor. It also does this, basically, on google maps. It ALSO follows you around and shows you where you are at any given time (including on the tee box). It also has a handy little feature for measuring shot distances (so you can see if you do, in fact, hit that 5I 180 yards -- turns out, I don't); use it consistently for a couple of rounds and you'll learn your distances very quickly. Neither one of them have a particularly good scorecard, but for what I'm looking for in a range finder/course manager, AirVue does the job pretty well.
--Mav