In Nov 2009 Slitherine removed the search function from the Field of Glory Forum. The entry Field of Glory Official Forum (Slitherine Software): Search Function? has a work around.
If you use Google and just add in
You can narrow it down by typing site:http://www.slitherine.com/forum/viewforum.php?f=53 to just search the army lists
Change the 53 to:
43 for rules
54 for modelling
47 for AARs