It would be kinda cool to have some sort of smart detection of the link, and if it´s a Flickr address try to get as much info as possible (count of views, favorites, explore index, etc.) about the shot and create some sort of display like the one for exif.
Of course there's the deal with Flickr security and privacy filters, and access of public photos that would have to be adressed and some sort of "flickr authentication" to Allow Imagevue access to personal galleries but I believe that it's workable.
So that's it that's my suggestion of a tiny feature
