Oooooooo boy! A vigin forum! (rubbing hands together )
Here's a question: I've been considering how to make a page supposed to render in a popup (a slideshow, for instance), stay in the popup - e.g. when you use the url directly you still get the popup.
It's a tough issue. Theoretically you could do something akin to frame forcing. I even thought of causing the page to open a browser to open the popup then close the parent window, though if a search engine has the page logged, people will have their browsers inadvertantly closed.