I posted earlier a webmap, quickly created to illustrate a point about the 2016 Olympic bid. I parlayed the custom symbology and list files into an internal app to track oilelefant prospects and customers.
When a friend's web site of Knights Templar lore across Europe posted their GPS locations, I created last evening a mock-up by Order and by Foundation to later integrate into that site. And over extended lunch I added driving directions, complete with a small guide. While not entirely integrated, it overlays a private dataset on a Google backdrop, and bolts it to their app. Two 3hr. sets aren't bad, to spatially enable a website!