I do hope this isn't taken the wrong way, as I'm really not trying to steal the thunder of this project.
I love the way Intro.js works, but I'm not a huge fan of the way it was written, and I'm going to need some extra features to make it work well for me. In that light, I've taken the liberty of creating a jQuery version of Intro.js that can be found here:
http://casiotone.github.com/jquery-guideme/
I've renamed the project to "jQuery-GuideMe" because "jQuery intro plugin" can't really be googled if you forget what the plugin is called.
At this point, it's little more than a port of Intro.js with a few extra options/callbacks/etc. I expect that over time, the projects will diverge significantly, but I'm happy contributing any appropriate improvements back to Intro.js.
Feedback/concerns are welcome.