This guy takes a novel approach to getting the overclocked PC above 150FSB - he assums EMI is interfearing with the components and specifically RAM in the system which makes it unstable. I don't know enough about EMI to comment on this, but the copper case he makes for his pc133 ram is an interesting feat to say the least.
FULL STORY @ WEB (http://www.u-oplaz.com/oc/RAM_shield.htm)