Well it looks like the earthquake could impact on RAM supplies as spot prices for most types of DRAM shot up today, from 5.27 per cent for DDR 512MB parts, with a session average of $1.44. So get your RAM now before it gets dearer, as the Supply chain will be upping their prices. There is even an exchange for Dram called imagnitivley DRAM exchange so if your into your market trading, this is where you go.
China, Korea and Taiwan also supply RAM so this may be short term, but the quake is having its impact. Check out the reg for more info