I just came across www.advertlets.com - and well, I can see so many possibilities in the development of this that I am sure some of the major companies will be doing a lot of research campaigns on this. What better way of being able to serve adverts that reflect what visitors are interest in - no matter what the site theme is - but to the demographic? I have so many ideas racing through my head on the possibilities of doing this to both better serve advertisers, bloggers and website visitors. It will be interesting to see how this develops over time - and when the major players adopt similar concepts. *Note* - It has nothing to do with me, I only wish it had... it is just the possibilities for highly targeted and relevant advertising through this approach are significant... or am I just thinking beyond the scope of the system?