PWStudios.com has just released its first PostNuke theme: dotSynth (Xanthia). This skin was previously released for phpBB2 and has now been ported to work with PostNuke. It is designed for gaming or team sites and is very easy to customize. It comes with all the .PSD's used to make the skin so you can make it as custom as you want it.

You can demo and download dotSynth here.