How to do it: Start a new blog and look for the button "Pick File" under your photo uploader. The browser should yell at you for security permissions. Look around the pop-up header area to allow it, close the window, and re-open it. Then you should be good to go. The largest file you can cross-load is 690k. You'll get a URL that you must copy/paste into your editor and ta-da! instant picture get.
It supports facebook, dropbox, google, and a few others. here's one from my instagram! when I visited South Korea last month. Do you know this movie? It's called The Host. It's a family drama with a giant monster shoved in the middle.
Do you care? I want to know! Try importing files under the uploader and let me know if it's useful, as this feature may self-destruct otherwise :)