I don't go anywhere without my iPad now. And, I can't live without Photoshop.
Adobe has come up with a possible solution. It's Photoshop Touch for the iPad (and Android).
I've looked at the features and it's pretty cool. The price isn't bad at $9.99 (is that suppose to sound so much cheaper than $10?)
Find out more at: http://www.adobe.com/products/photoshop-touch.html
But wait, there's something else you need to know about.
Photoshop Express is a REALLY nice online Photoshop Express editor. You just sign up for an account, upload, edit then share your photos. Oh, and did I mention it's free and you can access it on your iPad?