As keysersoze suggested, we should have an easily usable mean of audio conferencing / chatting integrated here on Website, accessible by everyone with just a few clicks and not requiring users to install software on their computers.
This could be used for example to facilitate realtime in-game communication with team members, and anyway to have some fast and direct way to talk eachother.
Probably we'd need communications organized in a IRC-like manner, with users distributed among talk rooms they choose from a list and also one-to-one links with no room.
I had a look at what ready-to-use solutions I could integrate in html4 / html5 webpages, but none are satisfying.
If you have opinions or some knowledge / experience with such softwares I'd be happy to read them. Software must be opensource.