1066 MHZ are available at newegg for 70 bucks.

I bought this kit months ago with ~the same results as Tony, but I run AMD.

940-980 4-4-4 is doable with 1.85 no sweat. Never tried for more, adjust skew to -150-300 to pass 900 though.

5-5-5 at 1.85 scaled right up to 1175 MHZ. Never tested for stability. Using mine now a 900 MHZ 4-4-4 1.775v (and skew as mentioned) for the last 3 months