I currently have several thousand (15GB) photographs stored on a PC. I would like to move them all to the cloud somewhere and use the iPad to manage them - change names, put in folders, etc. I also want to be able to copy pictures from the iPad to my collection in the cloud. I'm not committed to where in cloudland I should store my pictures - maybe PicasaWeb, dropbox, Amazon S3, or something else. I'm happy to choose based on what would work the best with an iPad management app.
Adobe Revel ($5.99pm or $59.99py)
Adobe Revel (previously called carousel) is a cloud photo editing and storage app, similar to Adobe Lightroom with the added function of being able to store images in the cloud. It is a subscription based service.
However this is currently only available on iOS, and Mac, with both Windows and Android currently in development.
If you were desperate to use this solution, you can get the iPad app, and sync the photos over iTunes and then use the app to pop the images in the cloud, however this would be time consuming, the Adobe website has a notify me, button on Windows/Android, so this platform will be available.