I was thinking something more along the lines of {WIKI}, something that could be entered into the search feature of the forum and only bring up the posts that matter.
having tried to use the search function a couple times, i'm not sure it's up to that task.
wiki gnomes are already updating the wiki by reading every post, but sometimes it's ambiguous what should actually be updated (like how many grenades were thrown, how much ammo was used etc). I guess that's a separate issue with a combined solution. I know if i were updating the wiki i wouldn't want to use the forum search at all. A tag would be good to indicate that something should be officially updated, but it might still be ambiguous what to update.
but okay, mainly i just think bolded GM -> accountant commands would be funny.
any of the actual wiki gnomes doing the updating want to comment?
EDIT: ahh just realised you probably meant the usual sort of ctrl-F search.
As one of said wiki gnomes, I don't think a [WIKI] tag or anything is necessary, though it would certainly help; especially if it had hovertext, in the case of used ammo + grenades, like you said. I really hate having to add "Partially used" or "Fired X number of times" notes to the wiki; exact figures are just so much better.

Agree entirely with items 1 and 2. Getting a medal for killing 10 enemies is boring; getting a medal because you dragged 2 wounded squadmates to safety and held off an enemy advance while they were evac'd is awesome.
+1 to this.
Medals are easy. I would just open a thread for suggestions, catalog the good ones, give them out when needed. Dunno if they should be entirely ceremonial and mechanically useless (Just like in real life) or if they should offer perks, like xcom medals. Hmhmhm.
What if you make medals pay out an extra token or two in the mission they are awarded; and use that as the system for determining if someone deserves more than base mission pay? Relatively easy to handle and might make your life a bit easier to boot.
That would either make non-base mission pay rarer or make medals too ubiquitous, I think. Maybe a combination of the two?
I like the attribute/circumstantial bonus medal reward system. We should definitively have at least some ceremonial medals, though.