Facebook Profile Page (Tab on a Business Page)

Been playing with Facebook a bit recently and thought I'd summarize a few points I've learned:

1. Tabs on business pages are called "Profile Tabs" in Facebook parlance.
2. Tabs are actually a setting off of an application (so you'll need a very simple application)
3. The URL to the tab content must be relative to the main URL (Canvas) of the simple application
4. Tabs are limited in functionality - they are markup only (no iframes) and a subset of FBML.
5. Inline CSS and Javascript only.
   
6. Flash can be used, but cannot be viewed until a user clicks the element (fb:swf)
7. Make sure you specify an image src on the fb:swf tag - otherwise there is nothing for the user to click on to start the flash
8. For some reason .htm/.html files wouldn't work for me, though .aspx was fine.
9. Images will be cached by Facebook (so throw a query string on if you want to force them to change).