Here is a quick tip to help you search and find all Windows Phone 7 apps using Bing search. Just click on this URL http://www.bing.com/visualsearch?g=wp7&qpvt=Windows+Phone+7+Apps# and the apps for your local market will appear.
You can also view by category, by newest, top rated, or most downloaded (as shown below)
Thanks to Paul Thurrott and thinkmobile for the tip!