Find on this Page is very easy. All you have to do is press command-F, or go to Edit: Find.
As for address bar searching, my favorite plugin is Keywurl. You can configure it to search just about anything, including I'm Feeling Lucky. In fact, that's one of its example demos. Go to Google...
Well, it turns out that the zip files were fine, but the Mac OS unzipper utility was choking on them. I used the Unarchiver, which worked fine.
And, actually, this script is just what I needed for fullscreen mode to be scripted. And yes, it still works in Snow Leopard! (All that needs to be...