I am slowly going through the forum and did not see this idea yet. If there is somewhere, I give all the credits to him/her.
Why don't you guys make it visible for us, who is on-line or off-line in guild tab. Not all members of my guild have to be my friends and I can't see if they are on-line.
I don't think we have to elaborate how to do it. Simple green and red light should do. I and probably a lot other players would be very grateful.
Thanks.