Interesting idea, but a client of mine has had a site live now for 2 years, virtually no IBL's (they don't encourage them on purpose!!) and yet they rank in the top 4 on google for 5 out of their six sets of chosen keywords and in what is a real competetive market (If you put in their keyword terms, upwards of 225,000 results come back for almost all of them). So tell me agin how important IBL's are??