I haven't seen any documentation about it, but is the new webchat application able to receive variables from the URL? I used to use ~&server=irc.nightstar.net&channel=%23demonpop&noServerNotices=true&noServerMotd=true&autoConnect=true&nick=SAIT_%3F%3F%3F%3F with the mibbit client, as a way to pass people directly to a channel with a pre-set nick, which I usually put into a tinyurl. Is there any such functionality here?
Yes. Very similar, probably shorter as well. open up the webchat, on the upper left hand corner there is an icon that has the word "IRC" in it. Click it and then down to "Add webchat to your site". Follow the prompts and you'll have something you can bookmark for future use. (Hint: the back/next buttons are on the very bottom right hand corner of the application)