basic editing of attached photo

On occasions when I take photos on my iPhone and then mail them to Posterous, there is no step to do basic photo editing. All I'm really thinking of is rotation, right now; screenshots or photos from the iPhone often come out sideways and there's no way to reorient them, is there?

if you wanted to get fancy you could add... I dunno, cropping. But I'd love to see rotation for starters.