SUSE-9.3 was the last acceptable "net distribution" - with an addon in size of 16 GB (sources were released earlier). That was already a huge struggle for the servers, but ftp.gwdg.de could stand to spill out more than 70 MByte/sec continuously for almost 4 days, due to the (huge, only ftp.kernel.org has more) 12 GB RAM. That was more than 4 TByte a day.
Well, I know one for sure that's at least as big.. www.ftp.be , aka ftp.belnet.be "The ftp-server resides on a quad-processor SunFire V440 with 16GB RAM and three StorEdge 3510 Arrays with more 4 TB of disk space for the FTP archives" It is always blazingly fast from every fast Belgian connection, and they mirror a huge amount of software. Perhaps they are a good possible openSUSE mirror? In the past they have always been very responsive in adding new mirrors, but now they have unfortunately not (yet) responded to my mail regarding openSUSE. Best, Lode