As I was looking for the location to a meeting my wife sent me, I noticed a new tab on my search results on Google Maps. You now have the ability to create and annotate your own maps directly on Google Maps.
Google Earth has had this functionality for a while. You could mark a map with a polygon, placemark, or path, save it as a .kmz file and post that to the web. Then Google Maps could open it and display it. You can create pictures or video placemarks (links to files elsewhere on the web) and a similar to Google Earth, you can save your search locations on the map too. The user guide explains all the functionality with step-by-step instructions.
All this same functionality has now been ported to Google Maps. It is pretty neat and easy. I made one map of two fun twisty routes near my house that I love to drive in my MINI. You can make your maps public and included in searches or unlisted so that you can give out the URL to others.
This is pretty cool. Now I can make my own routes and not have to always go the fastest way!