Nick Heer has a very interesting piece on The Sweet Setup on editing photos that will remain electronic (as opposed to being printed). You gotta love an author whose mindset is summarized thusly:
…I’d like to ask you a question: What do you think of when I say “digital photo manipulation”?
If you said “Photoshop”, you’re right; if you said anything else, go directly to Jail and do not pass Go.…
For the whole shebang, PYBT: The best photo editing app for the iPhone.