I am getting my feet wet in application development for Windows Phone 7.
My first App accepted into Market Place is "Traffic Tips".
1. If you have a windows phone, search for "Traffic tips" in marketplace.
2. External websites: http://www.freewarepocketpc.net/wp7/download-traffic-tips.html
3. Review(Look for traffic Tips)
4. If you have Zune try: http://social.zune.net/redirect?type=phoneApp&id=5d6d614c-bbf6-df11-9264-00237de2db9e