My DS had both prevnar and Hib vaxes before I was enlightened on the topic, and he has had pneumonia twice and a couple of bad ear infections. Now he also has "reactive airways" as they call it, not enough evidence yet to claim asthma I guess. My DD has not had either vax and has never had more than a mild cold.
I don't intend to give my DD Hib vax now because of the news on this thread. She is past the age where they give Prevnar.
That said, I am on the fence about what do with the H1N1 vax for our family because of DS's asthma-like condition.