I won't say who, but a major player in the memory world will be offering PC1066-32 perhaps the end of this week. So hold off on the stuff that is floating around.
My only doubt about PC1066-32 is how much headroom does it have? After all, it may just be binned 800-45 sticks. There is no guarantee it will do 150 FSB and over, or it may do 152-154 max. Remember, if it fails to do even 150, the vendor or manufacturer can just say, hey, it is only rated 1066 or 133 mhz. It's like Ebay, heh heh: "Did I say or is it stated it will do 150 mhz or over?". "Did I say it comes with the box but the box is ripped and crushed?" Etc., etc.
Maybe that's why Samsung refuses to label it officially as PC1200. And take it from me, as I've tested many many Samsung sticks, getting good sticks is a crapshoot. On one batch of sticks, 3 did 148 and 1 wouldn't even do 133.