First some may be asking what is RSS.
RSS is at its core a XML file that is updated as new content is published.  Using RSS Feed aggregator software you can subscribe to these RSS feeds of blogs like this Between the Lines blog using the link on the left side menu, discussion groups like the Autodesk discussion groups (see Robin Capper's article), and now the Autodesk product knowledge bases. RSS feeds allow you to get updates when new articles are published to the knowledge base. Think of it like a active notification of new items. You can even get most RSS feed aggregating software to provide notification balloons in your system tray or desktop when something is new.

There are many free RSS Feed reading software programs out there. I use RSS feeds because they allow me to read updates to blogs, knowledge base items, and discussion group posts at blazing speeds. It is just like skimming a newspaper for headlines of articles that may interest you. I monitor hundreds and skim through them in about 10 minutes. I also know people that watch as much as 900 RSS feeds.

For more detailed RSS information and answers see the the Wikipedia on RSS

You can see an image of my RSS reader (the free RSSBandit) showing the AutoCAD Knowledge Base articles.

RSS balloon notificationfrom a RSS reader

I even have RSS Feeds from blogs on my main Yahoo page with no RSS feed reader on my machine required.

Now for the links to the RSS feeds:

AutoCAD: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=2475323

AutoCAD LT: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=2475874

Autodesk Inventor Series: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=4183228

Autodesk Inventor Pro: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=4189372

Autodesk Vault: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=4517338

Autodesk Architectural Desktop: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=2476059

Autodesk Building Systems: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=2476435

Autodesk Civil 3D: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=3549480

Autodesk Map 3D: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=2786831

Autodesk Revit Building: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=3770375

AutoCAD Mechanical: http://usa.autodesk.com/adsk/servlet/syn/rss?siteID=123112&id=2334144&linkID=4198944

Cheers,
Shaan