Congrats on a great set of apps, we recommend them to all of our clients and use them every day. The guy who built the U3 package factory app at eure.ca is actually a good friend of mine, and gave me a special version of the packager that gets around some of the nigglies in packaging for .u3p. I did up Recuva and Defraggler as well, added them to that same page.
I'm also a closet mac user at home, and used Virtualbox from Sun to zip it up, guess it added some extra meta. All fixed now!