I know that I have mentioned Camera+ before as a great app for photos on your iPhone, but I feel I need to provide some before and after examples to really show the functionality of this amazing app.
I use Camera+ to edit any photo I want to post online now – the quality of the images far exceeds the capability of my trusty old 3GS iPhone. I know a picture tells a thousand words, so here are a couple of before & after shots for comparison: