irldonalb - 9:12 am on Jul 9, 2010 (gmt 0)
Simsi - I don't think that will work. The iframe isn't a link so putting rel="nofollow" on it will do nothing.
It would be like having:
<div rel="nofollow" etc etc>Content with links</div>
For argumentís sake, I've set this up as a test. I'd be interested to see what happens.