I have this idea from being on the market and seeing things like xboxlive messenger,where people not playing the game can keep in touch with those who are.
In the game there is the lobby. But it is very basic in a sense.
If there was to be a seperate messenger app that is completely connected to the game then there could be more features such as...
*Able to connect/see who's in the lobby as well as in game
*Categorize in game friends, clanmates, etc...
*Post your current status of what you may be doing in this game or in rl
...so many things could be added but it would require a bit of time to format.
And considering its seperate from the game, it can be "ad-supported".
Its just a thought I had. Its kind of like a google messenger specifically for InF. So you don't have to go through the hastle of asking people what is their Gtalk.