This morning's webscavations:
GuidaNatura.com is a very ambitious site covering all the comuni of Italy.
They already appear to have a page on every comune, that's several thousand pages. They rely on the comuni themselves and on other outside sources for the information on individual comuni, and therefore many pages are essentially blank, showing just a location and the CAP postal code. On the other hand, all their region and province maps are there, and if you navigate to any specific comune C, even if there is no other information, there's always a very nice schematic map of the province with all the comuni boundaries marked and comune C highlighted.
Only the top-level map, Italy and her regions, works as a clickmap, and the search function doesn't work yet (or at least not for me in Mozilla): to navigate, use the lists of places provided as text; which for now means you have to know what province and region a town is in.
All that said, some comuni pages have very good information; for example,
Cantiano, q.v.As you can tell by the name, the focus is on nature: springs, rivers, spas, caves, food, coasts, parks, mushrooms, etc. All of these have their own special categories, and the same navigation; for example, you can access information on each of the Comunità Montane in Benevento province; which in turn are cross-linked back to the individual comuni, etc. Info on agriturismi, hotels, restaurants, more etc.
There's a budding discussion forum with the same quiet level of moderation as here and a similar set-up.
All in all, this is potentially, and in spots already is, a very useful site.