I don't think anyone has mentioned a yet-to-be-finished mod for Rome Total War called "Lord of the Rings: Total War". It's done by some graphics designer with a bit of time on his hands (where would we be without people like that?
) who wanted to make a game more realistic and with more troops than the Battle for Middle Earth series.
For those of you who don't know about the Total War series, you basically control armies on a turn-based map (meaning each "faction" has its turn one by one, like Risk). However, when armies attack each other, you play the battle on a battle map, with a LOT of units. I haven't played it yet, but it looks pretty awesome, and a lot of work has obviously been put into it. The only downside is that there is no custom settlement work done yet, meaning when you attack Minas Tirith you basically attack a regular city on the battle map.
Still, check out
http://www.lotrtw.com/ as it looks awesome.