There is another MKT-specific list on Yahoo!, mktfansandmodelers that was started by Terry LaFrance after the founding of the MKT List. It's basically evolved into a secondary storage location on Yahoo! for posted pictures from MKT List members as the traffic is usually less than or parallel to it.
If you're interested in the Katy on the web
(or looking for quick answers), I suggest visiting
KatyRailroad.org, the official
website of the Katy Railroad Historical Society.