I know the new Mushkin modules come with 7ns Infineon chips, they're guaranteed to run @ 150Mhz 2-2-2 (they will probably run @ 160 2-2-2).
I got a stick of the old Rev.3 (not the new Rev.3+) and they work great, had it running @ 148Mhz 2-2-2 no problem at all (darn CPU wouldn't go higher).