You want to write and talk in the forum, if you think you can handle it, then by all means, go for it.
You can be editing or writing a hub and talk in the forum. It would be that difficult. The amount you would have to refresh a screen, so you can keep up with the conversation in the forum, is going to get really frustrating.
The forums are a place to bounce ideas, topics and a variety of other things, to either gather a debate or have a good conversation, which at times can be difficult and easy, depending on how you want to look at it.
The simple system HubPages offers is the forums, because they can be used for chatting. They are designed for spreading hublove, community support..(ie Extreme Hub Makeover) forum thread and bunches of people who are actively in the forums.
So, I guess I'll leave you with that to think about.