An interesting privacy problem this venture could solve is how malefactors can use an image search to see in what other sites a target's profile picture is used.<p>In general, you should be careful with using the same display picture on different websites for this reason.
I don't know the background (privacy) details of this service but it is certainly better than Facebook.<p>We're better off using Avatars (in multiples and as platform/interest dictates) than we are using photographs of our selves on open networks like Facebook etc.
Nice work. Looks like a useful service, would be interested in the pricing plans or how they plan to make money off of this.<p>Unrelated, but the link color on that blog needs to be much darker. I can barely read them, highlighting only made it worse.
These types of services really need to consider delivery over HTTPS, especially now that Facebook requires it for the app canvas and for added security over mobile WANs.