Ok let me go find my list again. Like I said some of these are pretty well dead, so I will provide a status report for each:
RTW
Diadochi - Total War Dead - 9 threads, last post July 22, 2010
Extended Greek Mod (XGM) Pretty well dead - 119 threads, last post April 30, 2011 but this was necroposting, other than that no activity since January.
Chivalry Total War (ChivTW) Dead - 42 threads, last post February 10, 2011, only 2 thread starts in the last year and a half at least.
The other 2 RTW ones I mentioned were simply 'libraries' linking people to AARs in the main forums.
M2TW
Broken Crescent Alive (but only just) - 64 threads, last post May 24, 2011. Only 1 on going AAR as far as I can tell.
Call of Warhammer Dying - 31 threads, last post April 18, 2011
Deus Lo Vult Alive (La Coupe's AAR is the only thing keeping it that way though) 55 threads, last post May 24, 2011
Kingdoms Grand Campaign Dead - 11 threads, last post March 24, 2011. Nothing that extends onto a second page.
PRO DEO ET REGE Dead - 8 threads, last post July 10, 2009
THERA Alive - 29 threads, last post May 25, 2011
Third Age: Total War Alive - 136 threads, last post May 24, 2011.The most active of all these forums, mainly because of Fanfics.
Westeros: Total War Not sure how to class this one - 10 threads, last post May 25, 2011. This one's a bit odd. There was no activity since August 2009 until 2 days ago when someone provided a link to an AAR written in Spanish and posted a rough English translation without pictures.
ETW
A Proper Empire: Terra Incognita Dead - 8 threads, last post October 19, 2010
Those are all the ones from my list that I compiled a few weeks ago when I dug through every single released, hosted mod forum, so I doubt there will be any more.
As you can see the state of AARtistry in the Mod forums is pretty dire, many subforums lie dead and those that are still alive are only kept so by a small number of dedicated writers, who keep writing despite receiving few readers and little praise. Many AARs that are started only survive for a few updates at best, there is a far higher mortality rate than in the main forums, most likely due to lack of readers and comments. That was why I wrote my review for Inarus in last month's issue and why I wanted to do the reveiw this month; to give these writers the recognition they deserve.