Web Photo Fixers: The Slide Show!

Photoshop Express (which at this writing is in the process of being rebranded as simply Photoshop.com) doesn't look anything like any other product with "Photoshop" in its name, and it's missing some very basic features, such as the ability to add text. But the interface is nicely done: Choose an effect, and you get thumbnails--in a row at the top--that show how that effect at various settings will change your photo. Click on a thumbnail, and you instantly get a full-size preview.