Alhtough I use skinz quite a bit, I've only dabbled here and there. I simply don't have enough time to do the work that I'd like to do.
That said, I did go through a BeOS phase and I created a few simple skinz which I've uploaded here on deviantART.com
Other than my day job as an IT Consultant www.ashbygroup.com, most of my design time goes to a few sites that I run. They are:
InterPUG - www.interpug.com
Nashville Palm Users Group - www.npug.org