Even the big guys like Kingston, Corsair and OCZ haven't got any samples of DDR3 memory yet. It is still in the labs and it is not available in quantity. They are still testing motherboard compatibility.
It will take at least two more weeks until these guys push any samples for reviews. The official launch date for the P35 chipset is around Computex, but you might see some motherboard reviews even before then, as we reported here.
DDR3 is an expensive beast, but it works with 1.5 to 1.6 V even when it's overclocked to 1333 MHz. we hope to get our hands on some of this memory soon.