I've set up my DNN site, but how do I prevent the search engine spyders from crawling it - I want it to be kept private.  I know I can password protect the page, but that's a little redundant - is there a way to add a "nofollow" tag similar to HTML?

You could use a Robots.txt file with the entries below:

User-Agent: *
Disallow: /

The major search engines are supposed (and usually do) respect your specifications in the robots file but you have to understand that this is not mandatory.  Also, if your site has been up for a while it may have been indexed already, so you have to keep all this in mind from the very beginning.  Once you are indexed it may be difficult to get of.

Carlos