The ICU website continues to be at http://oss.software.ibm.com/icu/ I suppose that there was a temporary networking problem somewhere.
The fact that you sometimes see internal machine names like www-124 or www-126 is due
to some misconfiguration. The ICU team does not itself control the server
configuration.
Most of the time, you can avoid seeing these internal machine names by using trailing
slashes ('/') at the end of URLs like above.
markus
