I have an Android phone......what I usually do is snap the pics and use the photobucket app to upload them straight to my account. Then, when I go inside to read the forums, I just paste the links in my replies.
I don't use it very often, but I also have the Tapatalk app which makes posting pretty easy without having to use your browser (don't have to zoom in/out to find things). Maybe it's available for iPhone also?