As this is the mirror that we currently sync from, and it's been down for 3 days (for rsync) - I'll confirm that it is, in fact, down for rsync.
rsync: failed to connect to archlinux.mirrors.uk2.net: Connection refused (111) rsync error: error in socket IO (code 10) at clientserver.c(124) [receiver=3.0.6]
I'm going to switch temporarily to rsync://mirror.rit.edu/archlinux/ as having a mirror 3 days out of sync is not good, but I'd prefer to sync from an rsync mirror in Europe. (One that is not my own mirror, of course (: )
=== At a quick check, it does not appear to be down, the box is up and it served up a listing of the Arch mirror via HTTP.
Could you perhaps be a little more specific as to the problem you're seeing ?