Free OS has a how-to piece about upgrading to 2.4.x, "The biggest addition comes in the form of the much-publicized support for the
Itanium, Intel's 64bit processor. While the processor itself is slated for release later
this year, the present support allows users to easily migrate to a 64bit processor
and take full advantage of the processor's architecture. For home users, the IA64
support doesn't mean much as it will take time for prices to come down and become
affordable. Additionally, support for IBM S/390 systems has also been added."
February 15, 2001