It's just a online version of Microsoft Photostory.<p>The music collection feature seems useful.<p>Edit: This is not the whole truth - the software "feels" the music - the effects it applies to pictures try to match the mooth of the music, like visualisations.
It's the next evolution of the Ken-Burns-O-Matic! Cool.<p><a href="http://en.wikipedia.org/wiki/Ken_Burns_Effect" rel="nofollow">http://en.wikipedia.org/wiki/Ken_Burns_Effect</a>