Hardwareluxx has some high res pictures of the MSI K7D Master, the Tyan Tiger MPX and the MSI K7N420 up at the site.
Go to JC's for a list of some reviews of Via's KT333. As we suspected, it doesn't really give a huge advantage over the KT266A. That's born out by another review at Tec Channel.
And another link found on JC's to an Nforce review by Mike Schuette, here.
A review of a SIS Microstar board here at Accelenation.
Extremetech looks at 13 DDR Pentium 4 motherboards in this piece. µ