We run regular ads in various magazines and to track the effectiveness, I've setup specific landing pages /magshortname.html, for each ad campaign. These aren't real pages, they are pointers to the main index page. I've also added these pages to the robots.txt so that they don't accidentally get indexed and getting us into a duplicate content situation.
Just wanted to see if anyone's had any experience with how Google and other SE's deal with these pages and get your feedback.
Cheers - MM