If you blog on the go, or need to do any kind of quick photo or image editing on the go, you could do worse than take a look at Pixlr.com.
A ‘full’ image editor right there in your browser. It’s surprisingly functional, I for one often use it to edit pics I want to use on my blog because, like Photoshop, it not only offers to resize the image but the canvas as well, making it easy to get it just right. That’s not all that’s nicked from PS, the whole toolbar looks surprisingly similar.
But hey, if it ain’t broke…. don’t turn it into the Gimp.