For Geeks Only: Favicons

Where have I been? Out in the ozone, I guess. I recently discovered four facts about creating a web page that only geeky webmasters could appreciate:

1. Favicons need not be named "favicon" (or more accurately, "favicon.ico")
2. Favicons need not be placed in the same folder as the html page that invokes it
3. Sub-pages need not have the same favicon as the parent page; similarly, …
4. Individual frame pages can have their own separate and distinct favicon

On the other hand, the path name must apparently be specified in full, not just relational (e.g., "http://mysite.verizon.net/gumby32/myfavs/images/portable-apps.ico" and not "/images/portable-apps.ico").

Regardless of coding technique, the real problem remains: finding images that retain any clarity of meaning when reduced to the required miniscule size of 16 x 16 pixels. Good luck with that.