the machine hosting springide.org had a hard disk failure. We are working on the recovery. It may take some more time. Sorry.
In the meantime you can reach the update sites which are all hosted on Amazon S3 as documented in http://forum.springsource.org/showthread.php?t=55145
HTH and sorry for the inconvenience.
Thanks, eclipse can see this update site fine.
Unfortunately, it throws a few dozen errors when I try to install on 3.4.2