Hello,
First off, huge congrats for this wonderful piece of software ... simply amazing!
A suggestion towards making lazy users' (like me) life even easier. Could you add a small button that copies the URL of the selected file to the clipboard? It could be placed near the existing "Browse" button for instance. It would be nice if it handled multiple selections (which are enabled already in HFS) and construct a string of URLs separated by line feeds for instance and copy it to clipboard. It would make it easier to copy and paste multiple URLs in your IM chat window with your friends (just an example).
To push things even further, you could add a small "copy to clipboard button" next to each entry in the file/folder listing of HFS. That way you won't even have to select the respective entry, you would just click the "copy" button then to copy to clipboard.
My two cents worth of suggestions ...