Is there any way to post new questions on an IRC channel?

savecancel

You can create a bot that reads the RSS feed from the site and post to IRC when it gets a new element or you can connect it with the signal as @Evgeny's answer.

There are a few irc bots projects written in python like bosnobot or pythonircbot that you can use for this.

Not out of the box, but it can be configured to do that.

The repository version (not released at the moment) has the "new_question_posted" signal, which can be connected to the IRC channel or something else.