The website IRC wont touch Esper.net at all. It will only use FTB forum Usernames.
I couldn't see a chat on that website (Tbh didn't look at hard either) :S
It may have to be a custom job due to the way it would work too.
IRC (probably at the bottom of the website)
People sign up to the Forums (so they can use the username/Use the forums)
Moderators have powers to deleted posts from IRC / Give warnings(&reasons) to profile / give timeouts from IRC chat.
etc
You might have to be logged in to see chat on there, I'm not certain.
It seems kind of a waste to have a whole IRC server just for FTB, but that could definitely work. I'd be happy with that, as long as I could still use an IRC client to connect to the chat (I'd need to identify using my forum login, probably).[DOUBLEPOST=1372538188][/DOUBLEPOST]
I think thats more of a shout box, & I for one am not a fan of shout boxes, with irc you at least have to go to the trouble of loading a client & logging in, so most of the time ppl only bother if they have something to say or an interested in a channel, with a shout box its too easy for trolling as its just there!, not that we have a huge problem here with trolls or it does not show up because of the moderators work, ether way a shout box needs a full time mod to control the natives.
Well, it's not exactly hard on here, we have a tab on the menu to virtually instantly connect to the IRC channel. That's almost a shoutbox, but I agree that we don't get many trolls (luckily).