It states in the Market overview that....
*Files Control Cut, copy, rename, send/share, delete, sort and create visible or hidden folders and files.
I can create hidden files/directories through the html interface by just naming them with a ".", but then once the're hidden I can't see them (obviously really lol) but there doesn't seem to be anything on the html side that allows me to show hidden files.
The droid app does have the option to show/hide .* files. The html interface really needs the same.