I recently received this offer at the Hyatt Regency St. Louis. There was a hang-tag on the desk, and to participate, I just hung it on the outside of the door.
Hilton and Starwood already do this, according to threads below.
http://www.flyertalk.com/forum/hilto...s-per-day.html
http://www.flyertalk.com/forum/starw...-go-green.html
Hilton offers 500 HHonors points, and Starwood offers either 500 SPG points or a $5 gift card.
It was fast and easy and the points posted with no hiccup! ^ I would definitely do it again - I'm not one who generally needs housekeeping unless I am staying long enough to use all the towels.
Have you seen this offered at any other Hyatts?