How about Publicfile? - http://cr.yp.to/publicfile.html http://cr.yp.to/publicfile.html Super duper secure and very, very quick, especially for smaller files.

How about Publicfile? - http://cr.yp.to/publicfile.html http://cr.yp.to/publicfile.html Super duper secure and very, very quick, especially for smaller files. I'd try and run some tests against it, thttpd and your existing apache setup.