becuase not everyone uses these forums, so how about instead of just a guild chat you have a global chat tab where people can recruit each other and help each other etc.
This idea is nice but I think in the progress will give their servers a hard time processing everything. We won't feel it by now since the game had just debuted yet, however in the progress, having floods of messages coming in from all over the globe ( i haven't count the spammers yet), will give a tons of work load. Although they could do some expansion to cater these, i don't think your device could handle such.
It's not something that they plan on undertaking any time soon but it is something that we have discussed at length.