Thanks to my coworker John V. :

Second Life Computer Remanufacturing apparently does pickup. I hope they do pickup, as I have untold hundreds of pounds of silicon that need to Go Away, and no easy way to make it disappear.

Furnish A Start will, according to John, come take away a bunch of the furniture lying around.

Vietnam Veterans of America (Clothingdonations.org) will apparently take almost everything else.

Any and all of which are better than dumping the entire contents of the house into a dumpster. A good chunk of said contents belongs in one, but the fact there's still stuff lying around that would be useable to somebody other than me has been rankling at me for awhile... and now I can Do Something About It.