For people whose routers are in a different part of the house from their cable box/TiVo, they have a product called SlingLink, which uses the household wiring to connect the Slingbox to the router.
SlingLink doesn't work for me, since apparently my router is on a different electrical circuit than my Slingbox/TiVo/cable box circuit.
I asked some computer sources about alternatives and got this:
"Wild guess- See if the two circuits are on the same "leg". If they aren't, swap one so they are and see if it works. If you don't know what I'm talking about, call your electrician buddy."
Anyone want to be my "electrician buddy" on this one?