Hey all,
finally getting round to a second post (!)
Stuart, that's a good idea. In the meatime, I've come across a tutorial on Lynda.com (Designing a House in Revit, by Brian Myers), so I might have a look at that as well. I remember Archicad used to come with a small, but very detailed model of a gatehouse, way back. The ideal thing would be something not so big or clunky in terms of file size, but demonstrating all of the software's tools at once.