[thelist] File hosting app

[Roel Mulder]

Hi all,
Does anyone know a decent (open source) file hosting application? I
need to distribute (hyperlinks to) sets of (large) documents to
several parties by email, whilst being able to keep track at whom
downloads what. It needs an authorisation layer, to allow specific
people access to specific directories (project info). Preferably send
e-mails directly to clients, with (hash coded) hyperlinks to their
files or directory.
I have a dedicated box near AMS-IX running CentOS, Apache, PHP, MySQL
on which I want to host it all.

sendyourfiles.com seems to offer the functionality, but is an open
source alternative available that you know of?
http://sourceforge.net/projects/php-dropbox/ is just too plain simple
and lacks specifics like decent roles.

Cheers, Roel