Firstly is an 'in-chat' game status window. If you ever host a game, it can often take a while to fill up, during this time you are often toggling between chat and the 'find games' tab. With this suggestion, if you are hosting a game, or you have joined a lobby, a small window in the bottom right will allow you to monitor the game status from within chat.
Secondly a chat background world usermap. This would display a dot for each usercurrently online, which i think is a nice way of seeing how the community is spread out and where specific friends live. Also, this could be integrated with the game status window, so all players who are in your game will be highlighted in a different color, and you could also move cursor over individual names to see where specific players are. This could possibly also help with isolating causes of high ping, finding players who live close to you, speak your language and with smurfing / cheating.
Just a suggestion anyway. Browser is already great.
