As an update to this question, I thought I'd let everyone know that these is now a release of RedHat 7.2 for Alpha systems. It was released a little while after RedHat relesed 7.3, but hey, at least it supports ext3 now. Oh, and the kicker is that the release was actually made by Compaq/HP, not RedHat and all of the support will be provided (on a fee basis) by Compaq/HP.

The release can be found at http://www.support.compaq.com/alpha-tools/redhat/