I think something needs to be about people who are online. Whenever I look at who's online and see what they're up to, they're always reading a thread from like 30-60 minutes ago.
Can the time that disconnects you from the online (thing) expire faster.
I like this, whenever I look to see who is online I always see quite a lot of people but when I come back about 1 hour later there is still no new posts and usually there is around 7 or 8 people on at the time and they are still on but still no new posts.