If you haven't, you really should check out the latest Google Earth version. New features include the ability to look into the ocean, decades old imagery, record your own tours, and more.
Personally, I like the old images the best. For instance, I've been spending some time looking at the city I live in and comparing it to images from above from 1990. It's interesting to see all the ways the city has changed since then. Pretty cool.
Google Earth Link