Yet another mulch question

I spied a pallet factory that has taken to coursely grinding the pallets, I think they had to many... acres and acres, now there is at least 50 semi loads of "mulch"

DH says it is probably full of nails, I say good iron content.. DH says its all hardwood I say, so it will take longer for it to compost.

I haven't even gone to talk to anyone yet, I wanted a few opinions...

Is this something I may want to see if I can get some... at a cheap or even free... one can hope right?

Fran

Free is my favorite price....

I'd say either as a mulch or something to add to a long term compost bin - if it's fairly fine, it'll break down a lot quicker than, let's say, chips.