Also for those willing to spend a little money...you can advertise your affiliate domain with a squeeze page on adwords and overture.

You can use this method to build lists, and pay your ad cost with sales from the product. The trick is before you spend a lot of money, do testing. Make sure your capture page (squeeze) has a good optin rate, and that the affiliate program you are promoting converts.

Using the example that Sam provides, you could use VERY related keywords like Anik Singal, affiliate classroom, or if your gutsy even a competiting keyword like affiliate inferno.

I may be more cautious of this in the "IM" market due to saturation, but I do know that it has worked well for me in the past other non-marketing related niches.