Seriously, the new bing map beta is the coolest map I've ever seen, and even better, its presentation layer uses Silverlight!
You can do easy zoom in/out and the quality of images is good. I especially like the new features such as current traffic (which shows the locations of road construction sites) and photoosync, how sweet is that?! Use bing map beta before you go, no more delays due to unexpected constructions!
I strong recommend everyone give it a try at http://www.bing.com/maps/explore/.
I bing, you bing?