There are quite a few jQuery web tour applications out there, but I found that when working in a corporate environment many of them didn't work ... or just didn't work right in IE7/8.
I put together this web tour jQuery application and have successfully used it and had no issues with older browsers. It doesn't look as 'pretty' since it relies on CSS3 to pretty it up a bit. But it's pretty light weight. It was my first foray into Javascript prototypes, and while I'm sure there are bugs, although I haven't encountered any game breaking ones myself.
The GitHub is up at https://github.com/drazion/Crimson-Tour - if you notice any irregularities or issues, any and all tips or suggestions to improve it would be appreciated.