I too have done some googling, so I have simply parked my domains at namedrive.com and they automatically put relevant affiliates on my webpages based on keywords that I put in.
some examples of websites I am using are:
www.wheelspeed.com (motor sport, racing)
www.premierconnect.com (Internet, ISP's, web space)
and some misspelled domain names.
Thanks again for your suggestions and help!