Hmmm the interface gives you all kinds of preformatted code, but not the code most people really want: the code to simply post the picture, without thumbnail or link to a separate page.
I'm skeptical about Webshots hotlinks holding up to high traffic. They didn't use to when I've previously had a Webshots account and the hotlinks didn't last.
I have been happy with www.snapfish.com for nicely resized image links that really hold up well even on high traffic threads, the pictures load fast.
You have to buy something once in awhile, some prints, or a gift, but their products are really good.