Here's another difference between MOSS and WSS. MOSS does much nicer usage reporting. But either way, to answer another question that was posed at the webinar, there is site usage reporting available in SharePoint for your sites, blogs and/or wikis. That means you can check to see who visits your blogs and wikis, and how often.
It's important to regularly check the site statistics for the sources that you diligently maintain. If you've promoted your content well, organized it in a meaningful way, and update it regularly, you'll want to know if all your effort is paying off.
The WSS site statistics are quite basic. Here's an example, from my SharePoint site, which runs on WSS:
Here's one, complete with graphs, from MOSS SharePoint. Much prettier.