1) Do you have download statistics? Personally I'm using the deb x86-64 mirror on (almost) daily basis, but I realize that we should address the needs of the community rather than those of the readers of this list...
2) In case we get over the problems and get some space for new mirrors - how about setting up a ClamAV database mirror? I understand that it has very low disk usage (50MB?), but it does require special settings (they use a push-mirroring system). http://www.clamav.net/doc/mirrors/clamav-mirror-howto.pdf
