Recently I picked up four of the Iris buttons at Lowes (Gen 2) that have been on sale for in various locations for $10. I've got a handle on the quirks and tweaking required, and they have actually been working very reliably and I'm growing unexpectedly fond of them. But I really only had clear plans for two of them. However, I believe I have come up with a good use for the other two in one of our kid's room.
The bedroom has a light attached to the wall above the bed (directly wired, no plug) that serves as the primary room light - controlled by a switch at the doorway. The light has a switch on it as well, but it's inconvenient to use it both physically (it's mounted several feet above the bed) and logistically - once it's off at the lamp, the switch at the door won't turn it on.
So I'm thinking I'll put a connected bulb in the fixture, mount one Iris button above the dumb wall switch, and put the second one on the side table next to the bed. Boom - I've got a three-way switch on the lamp for just $35 ($15 bulb, $10x2 for buttons) and no wiring required (no neutrals in this part of the house, so would have been a PITA).
A quick and dirty upgrade that will make good use of my button surplus, and will take all of about maybe ten minutes to complete. I can't think of any downsides, aside from potential reliability issues w/the Iris buttons, and it's easy to reverse this setup if that issue does arise.
Anyone else who's done this or similar and have tales of woe (or valor) to share before I embark?