Adobe have released an online photo editing app which they have called Photoshop Express.
You shot it — now do something to it. Make it pop. Make it impossible to ignore. Upload, sort, polish, and store up to 2GB of photos. All for free. Resize, tint, distort, and more — add your mark to all your images. Then show them off on Adobe® Photoshop® Express or your Facebook page.
A bit of a warning, this is not an online version of Photoshop. This is an online photo editing application which Adobe have called Photoshop Express.
It reminds me a lot of iPhoto and many Mac users will find it pretty simple and easy to use and very familiar, but obviously Photoshop Express also works on Windows PCs.
Unlike (the real) Photoshop which has a pretty steep learning curve this has a pretty simple interface which works quite well.
Certainly worth a look as both an online photo editor but also as an online photo storage tool.