Yeah imgur or imageshack are your best bets, then just use the forum code, or in the case of imageshack forum code and only post the parts in the tags.
Also with imageshack it'll want you to log in, so here's a trick. When you upload, as it finishes get ready to press the ESC / stop button on your browser. Hitting it a few times allows you to grab the Forum Code field, without getting the stupid "Registration is free" overlay that comes up :)
There is another way using only The Kennel. When you upload your picture here, click the attachment and that will give you a link in your browser. Grab that link and wrap [IMG] tags around it and it'll display the picture for all to see.
It's a clunky way to do it though.