Distributed computing with routers...

Here's a crazy idea, and maybe someone has come up with it before. If they
have, I'd certainly like to know about it.

A lot of today's commodity wireless routers and access points have fairly
powerful embedded CPUs, and there are plenty of alternative firmwares that
base on the customizability (sp?) of the Linux OS. Many of these routers
spend all their time plugged in and powered on...a great situation for the
average distributed computing project.

So...why couldn't a router run a distributed computing program, such as
distributed.net or SETI@Home with a low priority client that would yield
processor time whenever a router/AP related process needs it? Has anyone
ever tried this? Are there any programs out there now?

William