I saw this new tab earlier but just ignored it (who needs another “my” tool?), but then I read what it was all about on Lifehacker and had to share.
To add multiple layers of data points to your maps – like information about real estate prices, weather, earthquakes and movie showtimes – from the “My Maps” tab hit “Add content,” and watch all those third-party Google maps mashups get consolidated onto GMaps proper.
Very very very cool! This is a great example of how using user-generated content can add value to your tool (or possibly – you library catalog?).