I bought Hype yesterday, and i believe it (bad joke). Hype is similiar to Flash in that you can create animations and interactive websites though it uses HTML5 and CSS instead of its own propriety file format which requires a plugin (and doesn't work on non-Flash supported devices anyway... like my iPad).
Having had Flash training a few months ago i found understanding Hype's timeline based interface quite simple (though its a lot less developed than Flash obviously which has been around for many years). It works pretty well though noticed some font differences between Mac and PC/iPad. Here is one of my test examples i created yesterday.