^depends on the TV. I'm pretty sure my Toshiba Regza HDTV doesnt support it.
But if you wanna use your Logitch Harmony (like I do), buy this:
http://www.bestbuy.ca/catalog/prodde...02&catid=27031
Plug the USB dongle into the PS3, and program all the needed buttons from the Nyko remote onto your Harmony.