Here you will find all of the tactics pages that I find particularly useful, both here and throughout the blogosphere. It is small now, but it will be added to as I find more tactica to link to.

Defending Humanity: The Tactica of the 24th Fortunan
Tactica: Armoured Sentinel
Stormtroopers: The Emperor's Scalpel, part 1 and part 2

Devouring Humanity: The Observed Combat Strategies of the Great Devourer
Tactica Tyrannofex

Send In the Clowns OGRES: Circus Routines from The Biggest Show On Earth!