Danny spotted and featured a thread by moderator Jeff Martin at Search Engine Watch Forums. The thread is named Paid Inclusion Making Yahoo Results Seem Hijacked? and shows how since the recent Yahoo! SERP Update business.com redirect PFI links are being drifted to the top of many of the competitive keyword searches.
Jeff reports that he is noticing these Business.com redirected URLs are "now ranking #1 over state government agencies that police this industry and .edu sites." Jeff has more detail here where he suggests that Yahoo! PFI results have been hijacked. Danny offers a logical reason for all of this in the thread. So he feels that the paid inclusion part makes it look like a hijack when it is really not.