I have set up a bunch of folders on Camino's Bookmarks toolbar, and I like to load all the pages at once -- I had been using a control-click on the folder and then selecting Open in New Tabs.
I was surprised to find that just pulling the icon down a bit, then releasing it, does exactly the same thing (at least on 10.3.5 and Camino 0.8b). This doesn't work in Safari, though.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040906125912307