well i already thinked some feature like this, but the only way i could imagine to do this(at least with this last beta version) it was...
i upload a file named some-file.extension ex.:
ledufe.jpg
then upload a text file named ledufe.jpg.comment with the comment/description to the ledufe.jpg
inside the .comment file you can use any html/xhtml code
this would help you to put a description/comment to the file that you are uploading, but to update the comment or delete the file, i don“t have any idea, besides use another server/tool like a ftp with the upload dir acessible and with the rights to delete or access your pc runing the hfs via some remote desktop conection like terminal server or vnc...
well just wait for the hfs new version with php suport it will let us to do this via php code and much more functionality, and if it suport php it will access some data base like mysql too, and then.....well we will do anything you imagination and skills let you do....
just wait.....
i put my trust in rejetto programing skills.....he is the man....
sorry for my poor english....