Via Common Craft, WetPaint has created a series of video parodies to advertise their easy to use wiki service. WetPaint uses a WYSiWYG for editing, which seems to be less awkward than the one now being used by PBwiki. It also offers users unlimited memory, though there is a limit to the number and size of uploaded files. Common Craft, the creators of the Plain English series, has partnered with WetPaint and has created a video highlighting its fearures.
A sampling of their parodies: