Hey, skwire, I guess adding it to SpinZip would work as long as I could drag-n-drop a handful of folders onto it and have it zip each dragged folder individually. Of course, I would prefer if it used RAR, but if that's not an option, ZIP works. Since any coding I do is in JavaScript or ActionScript/Flex, I have no idea of what's involved in calling another program or registering an extension with the shell -- that's getting way beyond my level of competence or understanding.
Meanwhile, while I was at the Skwire Empire, I downloaded Trout and I'm testing it out right now. I think I'm going to love it. Besides everything else, it's CPU usage is barely registering on Process Explorer. That's important to me as a web developer since I'm usually running Firefox, IE, Safari, Chrome and Opera when I'm building and they're all resource hogs. A lot of times, I have to work with no music at all since iTunes and even MediaMonkey use magnitudes more cycles than Trout. Working without music = Horrors!