henk, are you behind a proxy? The download would only work from file-uploads if you download from the same location as the one you used when you first visited file-uploads.
Anyways, I am downloading it right now and will move it to another of our servers as soon as it's complete. Should be up in 2 hours (file-uploads is kinda slow with 100kb/s right now).
gaius@debian:/home# wget http://download3-6.files-upload.com/2007-03/31/13/iliad-dev.tar.bz2
Resolving download3-6.files-upload.com... 126.96.36.199
Connecting to download3-6.files-upload.com|188.8.131.52|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 756,656,635 (722M) [application/octet-stream]
6% [=====> ] 52,359,168 114.09K/s ETA 1:55:00