University of Wisconsin mirror
Was good for 4.2MB/s for me, although it has declined slightly... should still be good for 1MB/s if your connection can make it.
*** edit ***
Sorry guys, I just checked some of the network details and it looks as though they finally put a bandwidth cap on the mirrors.
Last year they were using 150Mb/s for Redhat 7.3, last week they were using 100Mb/s for Mandrake 9.0, but as of today it looks like their bandwidth was capped at 50Mb/s.
So no ultra-fast downloads this time around, sorry.