We've done residential play structure installations of this kind of mulch - it serves as a great landing pad for kids launching themselves out of swings, and to cushion the usual spills.
I'm surprised to hear it would be making it's way into garden beds; it's completely inorganic and does nothing for the plants, and it's very expensive relative to traditional bark mulch. I believe we paid more than $500 per yard for the stuff, compred to $14-22 per yard for bark mulch.
Jeff, you already have my pager number; give me a call if you want to chat more about this...I could use a break from the project we're working on.
