Anquan Boldin is not a free agent — he has two years left on his current deal with the Cardinals. I’ve heard everyone from my old man to all kinds of various other people (especially in our comment threads), and it’s simply not true. He became upset with his existing contract when Larry Fitzgerald signed a new deal that was bigger than his. From Wikipedia:
Boldin requested a trade following the 2007 season when his fellow wide receiver Larry Fitzgerald signed a four-year, $40 million contract extension with Arizona  and the Cardinals declined to renegotiate Boldin’s contract. He has two years with $12 million remaining on his current contract.
So, Boldin will not be coming with Todd Haley to the Chiefs. If we want to add another elite receiver, our only two options are really either drafting Michael Crabtree or signing T.J. Houshmandzadeh, who in my opinion is a lot like Dwayne Bowe.