I haven't treid any of these paid ones but I tried most of the free ones and I go with WikiTap (http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=291701649&mt=8) though it isn't the prettiest. When I was searching for pyrrhic victory WikiTap was the only one that found it despite my horrible misspelling of it. Not to mention the ready-to-view YouTube videos helped illustrate the size and use of a windmill shuriken to a friend of mine.

My only want is for it to copy the display of Quickpedia.