I just integrated Filepicker.io with a client site (http://SetForMarriage.com), and it works amazingly well. Choosing pictures from Facebook/Dropbox is great for mobile users, and uploading via webcam is awesome for people who don't know how to get their photos onto their computer (a pretty good number of older dating site users).
The UX needs work for sure..but think its better than longer blogs and Facebook stories. The interesting thing is that since it doesnt have ads on it now it feels clutter free. Not sure how that will change once Google decides to monetize G+. Right now they are in "establish the platform" phase and that is bound to change.