I would like some kind of quick way to message some simple yet efficent info to your teammates without something like teamspeak or super fast writing skills.
I suggest that when you press a key X (X=some key) you send a little emoticon to your teams minimap into your current location.

Example taken from an another game:
http://i1143.photobucket.com/albums/n625/Turska/KAGshout.jpg
Failing copy-paste example made in 2 minutes in AoS:
http://i1143.photobucket.com/albums/n625/Turska/AoSShout.jpg

very good idea i hope he adds it...

I really like this suggestion, but can you make a new title and repost the thread? "Map location indicators" or something would be more obvious than "emotions".

Tactical animations! Sure why not. But we don't have fingers, so hand signals might be a little wonky.

How about a quick text message? I think its called CODEX or something. Even give the option of setting what the messages say themselves? For example press L and a message pops up saying "Enemy sighted" or something lol. I guess to prevent spam you can only send these messages once every couple of seconds?

That could work, too, I suppose. Easier than stopping and making yourself vulnerable for several seconds while you type that out.

zxc opens up a list of commands
each list has a max of 10 commands and can be said by pressing the number behind it
it will be seen on teamchat

TL;DR
tf2 command menus

Grenade needs to be one of them.

Bumbity bumb

Example; if someone of your team does emoticon and it wouldn't be close enough to see in your little radar thingy it shows the emoticon next to your radar so you can check from minimap where your ally is:
http://i1143.photobucket.com/albums/n625/Turska/Ace%20of%20Spades/AoSShout3.jpg

Another example:
http://i1143.photobucket.com/albums/n625/Turska/Ace%20of%20Spades/AosShout2.jpg

.

Another neat thing could be that you can see your enemies emoticons after you've captured their intel for a limited time. (like you can already see their positions)

.
@Kaede, we do have fingers :D
http://i.imgur.com/4y724.png

what game was that?

@Bobbunny
King Arthur's Gold

Extract from IRC channel over a month ago..

<hompy> some way of pinging the map would be incredibly useful and would encourage teamplay
<TheGrandmaster> but as hompy says and you're saying - map flares
<hompy> i'm thinking something warcraft 3 style, with a little beeping sound and a marker on the map with the pinging player's name under it
<TheGrandmaster> yeah that'd work alright
<hompy> "wheres the intel??" "right here *ping*"
<TheGrandmaster> when having the map open, press 'f' and click on a place on the map
<bcoolface> that would be cool

@DeathEnhanced:
Not the place to ask. IRC is probably the best place to query.

still a good idea... if you could make your own that would be call cause then you could have clan emblems :)