No problem.
The best example I guess would be the Profile module, the view function (it uses a few different data functions, returns the data and sets them to a template), or for processing, the RouteMap module (I think the video tutorial goes over this), or the XML module.
I'm gonna be re-doing a tutorial on this sometime this week to coincide with the release, but definitely, any questions let me know. There's all sorts of info strewn around, so I have to try to get it all together.