ok, I've been reading for a few days and have some general comments. There are some very good idea's being raised (story lines, major events, adding more quests, etc) but I think those definitely need to be future plans and they require a lot more work. As since Sparehawk is primarily working on this now its also up to him what he wants to work on.

But in my opinion, there is some minor tweaking or balancing that needs to be done first and once we have a good baseline we can try to add more functionality on to it. The main reason I play M&B is so I can quickly start the game, fight some random battles, and then exit so for me the basic game should take priority over larger concepts and changes and I do like that its open-ended. I also think we have to remember that this is a mod based on ASoIaF but not an exact replica of the books so it seems fine to take some liberties in order to have some gameplay balance, etc. This mod is very very good, and everybody has done an excellent job, I know many of these points have been discussed but we probably still need to review the following....
1) decide on the different factions
I would vote for the earlier suggestion of the following breakdown. Give Renly and Brienne to Highgarden, Stannis can be separate, and if possible switch Greyjoys to a small faction and the Vale neutral. Maybe in a future mod the Vale would change loyalties but for now just have it be neutral.
- The North, with the Twins and Riverrun
- The West, with King's Landing
- Highgarden/The Reach, led by Renly Baratheon (w/ Brienne as a knight)
- Dragonstone and The Narrow Sea, with the Stormlands, led by Stannis Baratheon
- Dorne
- The Iron Islands
- A neutral Vale
2) villages, towns, cities, etc
fix any display issues with the villages (no snow in the north), missing village mayors, add a goods merchant to castle black, potentially switch a few villages to castles etc. putting Janos Slynt as lord of Harrenhal would probably work.
3) NPC characters
rename a few of the NPC characters like the individuals in the castle black tavern, a few of the weapon smiths or the tavern keepers in the bigger cities if we have some names to use, etc. Make sure NPC's are on the right faction depending on what we decide on #1 above. Also, Nights watch upgrades to slave drivers so that upgrade path needs to be fixed.
4) items
potentially remove a few of the items like the Japanese ones that came from the BoW mod. Black gauntlets would be cool and i'd like to add a few more uniques like Rhaegar's helm, greaves, gauntlets. Black/grey leather armor and boots for the nights watch, etc. The Valyrian Axe is cool and is supposedly with House Celtigar of Claw Isle so does the name "Lord Celtigar's Axe" work? Maybe some minor tweaks to the textures of the current Valyrian items since the texture on the blade doesn't seem to be consistent (different on top then bottom). Also, I know the Oathkeeper sword wasn't forged yet at the time of this mod but it would be pretty cool to see a reddish valyrian steel blade....
5) balance or fixing the factions and enemies
This is tough to manage but currently Greyjoys seem overpowered and Others are weak. What about the sizes of the other factions and their number of troops? Since the AI is going to control a lot of this we don't want some getting too powerful too quickly, etc. Somebody said Tyrell didn't have horses but I though that was fixed in the 0.3 updated troops file and the 0.4 release seems to have those changes.... random question, should Others have horses?
6) textures or other graphics
do we need flags created for some characters or any more textures (like horses for the Others) ? also, a lot of other mods have created some very cool models so maybe some of those should be integrated. Is anything else out there that we should drop in? I suggested the town seige fix which Sparehawk integrated which I think was great, I'm not sure if there is anything else that people have seen that we could use?
7) minor coding changes
In the 0.3 release I think Chivalric switched it so we now get different amounts of money for our prisoners so that was very cool. Currently there is no way to leave a faction once you give your oath to a lord and I know a few other mods have written some dialog to call the function that allows this. One of the mods increased the damage so the battles were faster and switched food to only be eaten once a week, is that of any interest to anybody? Are there other minor code changes that could be done that might make the overall gameplay better?

other bugs
try to post any bugs you find, if possible maybe try to group them into one post so its easier to review?
9) what is the priority of these items and who is going to do this work?
right now Sparehawk is the main person working on this mod so I'll let him answer this question.

I would like to help out so have been reviewing the modding documentation and tools but am not really a coder but will try to figure some things out.

I'm not sure if you have done it yet but have been working on modifying the troops.txt file to rename some of the NPC characters and maybe fix the issue with some missing mayors, etc. I also edited the items file to add rhaegar's helm, gauntlets, and greaves so could post that if you wanted. I was hesitant to remove any of the japanese items because these are used by some of the NPC characters I believe. Is there any other specific area's you need help with?
Anyway, I know this post is long, and a lot of this has been discussed before but I just wanted to try and summarize some of my thoughts. In general this is an awesome mod, I just want to make sure we fix a few minor things first before thinking about the next step.