The idea of a personal assistant needs no introduction: you already know Siri, and those of you fortunate to own a Jelly Bean handset (or at least a hacked ICS one) have the privilege of using Google Now So there's very little we haven't seen here. And yet, we were inclined to take a look at Indigo, a new personal assistant for Android and Windows Phone 8 that launched yesterday, and will be available as a free download in the coming weeks. Meet us past the break to find out why.Gallery: Indigo personal assista