As part of my work project I have been asked to port our existing Google Map pages to the new version (3) of the API, which has some speed improvements, more options and doesn't require an API key! I believe it also has some support for the new Geographic properties in HTML5 (though I've yet to test this theory!).
If you like this example check out my example using a jQuery plug-in to pop up a map in a fancybox window here