[T2DMan]

Google has got a site map system whereby you tell it the url's of your website, and it is then able to find them easier. You can diret it to look at the url's less often than they would normally (ie if content doesnt change too often) and so save bandwidth, or for google to check more frequently if content is often changing.

It is especially good if you have lots of new threads being created. The sitemap will show the create date of those threads and google should find them faster than otherwise.