I signed up for Picasa and Flickr today. For the life of me, I can't figure out how to show upload a photo without it being a thumbnail. I want pictures to show up without someone having to be logged in or having to click on the thumbnail to view it in a larger size. I tried searching here and on the web with no luck.
so, get the url of the picture on the hosted site, and then click the photo button in the reply section here. (its yellow.) paste the url in there when it asks for it, and you'll be good to go.
You can either use photo Icon as MWK suggests along with a copied photo from your own photo host site or a copy photo from another site, or basically insert copied photo between below bookends: