Funny I was doing the same... I think that alone suggests that the marketplace isn't filling every need.

I really love the S3 peice... should allow them to keep prices way down and stay profitable.

What I wanted to do with satchl was provided the ability to drag and drop files onto a drive/mount point which would also appear as a web page (a 'desktop' if you like). There would be a couple of versions of the desktop available: a public one and a private one with a single password for making changes. I was targetting a family that needs to share files across the world, or a small company. I had fun writing all the Ajax stuff for the virtual desktop...

Have you used Tortoise SVN on windows? I'd really like something along those lines to be honest.

Dropbox looks like a great alternative though.

What convinced you that you couldn't?

I figured that the key to this was ease of use, and by that I mean really, really easy to use. I didn't think that I'd be able to get it to be so easy to use that my mother could use it.

And therein lies what the DropBox guys figured they could do. I didn't they could either until I saw them demo it. It's really quite slick, and is a completely different product than the usual "online storage" product. It's not yet another "web-based file manager"...it's a file system that works seamlessly over the Internet. With revisions.