I also want to know why this feature was removed. I'm not sure why I would need to ask for a feature to added when it was actually removed.
This used to work prior to the latest update of the Eye-Fi Center -- now I have to jump through hoops to post files to FB/Picassa/Flickr/etc. Not all of my files show up in the Center even though they are getting uploaded to my computer. I don't want all my photos going public and if they don't show up in the center, I can't use your nice drag&drop features. I don't want Eye-Fi Center to be my photo manager, I just want it to work seamlessly with the rest of my photos.
You video shows drag&drop from anywhere into Eye-Fi Center at around 2:00 in.