You have to have them hosted on the internet somewhere. You don't have to use this site, there are a million other places you can host 'em. Flickr, imageshack.us, your own web hosting space, etc. Once you have a valid URL for the image, the rest is a snap. But you've got to have it hosted first with a valid URL. My favorite is imageshack.us but that's just what I'm used to.
Tent camping for now. Dreaming up a new 4x4 SMB. Gas or Diesel?