Logitech Shop - Logitech Harmony 515 Remote Control & PS3 Adapter - $75
This is a great price combined as the official sony blu-ray remote for the ps3 is about $40 or so anyway...you may as well combine all your remotes into one for that little bit extra as the ps3 adapter alone seems to be a bit pricey too...I can't find it anywhere for less than $70!
So for the Logitech remote alone it's $39.95
The ps3 adapter alone is also $39.95
Combined together you can buy them for a bit less @ $75 including shipping.