Not that shell. The UI shell. Explorer. You can browse FTP sites just like network file systems, including drag and drop.
Go to Start->Run.
Type ftp://ftp-site/path/to/file. Drag and drop to your hearts content.
Type ftp://ftp-site/path/to/file. Drag and drop to your hearts content.
Versus drag and drop file to this page. There you go. It's uploading.
That's why I said Dropbox or a Dropbox-like service, of which there are hundreds. Microsoft SharePoint is but one example.