Distributed Subwoofers - Options

I know that Duke from Audiokinesis manufactures the Swarm.
I was recently told that there's another system available from a boutique guitar (Guitar?!) dealer somewhere in the Southwest, but I can't find anything more about it on the 'net.

I guess that you could also assemble your own, but I was wondering what's out there in the way of complete multi-sub systems. Anyone know of good options to learn about?

Thanks in advance.

Marty