The going joke today is that this is great for sextexting. I don't think so. This is good for those who wants to send inappropriate pictures or messages but don't want to leave a trail.
And here's the thing I don't get. Why would Facebook come out with this? To make money off these kinds messages, a vast majority of them will be inappropriate anyway? You have to wonder what is Zucker's team thinking here.
And this being Facebook which will also try to leverage information that it collects from users, I hope Poke users will understand that there is a good chance FB will be saving those disappearing messages somewhere, somehow, and hope to sell that information to advertisers.
I don't plan on downloading this app because for the reasons I mentioned above. Frankly, I don't need it. But I reckon that the handy screen capture feature on the iPhone may way make this whole disappearing thing kinda moot.