Mushkin Rev. 3 is guaranteed cas2 at 150mhz but costs way too much.
I would check with John in the FS/FT forum for some Mosel PC143, he guarantees his ram at 143fsb and I've seen people run it from 154-156 before.
Also, Kingmax PC150 tinyBGA memory will run 150fsb guaranteed as well.
All of these are great overclockable RAM chips.
dm