Shotty Too Hotty wrote...
Once Skype is introduced, any Forum's site chat dies slowly or instantly.
Nay, I know of plenty of communities that use a combination of all three. Personally IRC is the way to go if you're looking for a messaging service and mumble for VOIP. You can't beat the features that IRC offers, bots and scripts are a wonderful thing; Mumble is great because voice data is transmitted over a secure network. Skype is good if you have a small amount of people, 2 - 20, that you regularly communicate with, but, unlike mumble, data is transmitted over an unsecured network.