I had been using Box.net online storage service long time ago but it’s can’t syncing of files like Dropbox.Recently Box.net giving away 50 GB of free online storage who uses a free Box Personal account on an iOS device ( closing date 2/12/2011 ),with it SimpleShare app for sharing files, screenshots and screencasts across the box.net storage system from your desktop,you may consider using Box.net as storage system.
SimpleShare let you making screenshot or screencast by right click on icon and select the function,you also can use SimpleShare hot-keys for fasten launching the application.A unique url will be created for every file you upload, so you just share the link with anyone.
Right click on the file and select 「Upload With SimpleShare 」 option,the file will upload to Box.net immediately.
You can view the file in box.net.Click 「File Options」 to get more selection like download,share,tag etc ,remember all the files or photo upload to Box.net is Share on default.
Moreover,Box.net having external links to others web app.You can use Picnik to edit the photo directly.
The advantage box.net compare with Dropbox is able 「Create New Task 」option which let you send file from Box.net to others collaborators review or edit files.