Pardon my ignorance - is there an RRS feed available for these boards?
At the top of the topic list for each forum you'll see a large orange awasu square. That's the subscribe link for the RSS feed for that forum. Only new items are included in the feeds, so you can't tell when responses have been made.
If that wasn't clear, click the "Awasu - General Discussion" link near the top of this page and then find the orange square. Click it and see what happens.