Quiksee, the site that allows you to create your very own Street View like tours with Google Maps, is today coming out of private beta and anyone can now join.
Quiksee is a location based online tour creator that uses Google Maps to show the location of created tours. The site lets you quickly and easily create stunning visual experiences of real world places. With Quiksee you can click on a location and start walking around that place as if you were there. If you are in fact there, you can film your own Quiksee tour and share it with others.
Here's a screencast of a Grand Canyon tour,