In a nutshell, all you need to do – is create a PowerPack (PowerGUI extension), export it, and post it to the PowerGUI library. This is easy and fun (watch this online tutorial) and you can compete for a bunch of prizes (sponsored by Quest). The jury includes Jeffrey Snover (!), Marco Shaw, Hal Rottenberg, Kirk “Poshoholic” Munro, and myself.
You can read more at the contest page. Time to have some serious fun here!