Denver nonprofit Stepping Stones has a mission to provide resources to people of the Jewish faith: welcoming new members and helping people new to the area acclimate. They hired Planet Telex to add an interactive map of categorized places that are of interest to Jewish people. Planet Telex created a robust solution based on Bing Maps that places custom icons around the city and adds a legend and other navigational features, including driving directions and satellite view.
One feature of particular note is a custom location clustering algorithm Planet Telex built in C# and integrated with the map via AJAX calls. See this feature in action by zooming in while looking at a Star of David icon- the icon used to represent multiple locations. Notice that as you get closer to Earth the icon will break apart into multiple other icons as the resolution increases.
Play with the map on the live site.