To start off the Picasa-Maps mashups, I’ve put together an example that combines a Picasa photo album feed with the Map API’s recently announced Driving Directions feature to calculate a driving route that will get you a similar set of photos. Now, no need to be jealous of your friends’ pretty landscape albums – just copy them! Try it out below by clicking “Load Album & Route.”
with a bit of additional hacking, a youtube version of this shouldn’t be too hard.