Sandisk's (NASDAQ: SNDK) strong momentum continued as it once again reported surging revenue and significant gross margin expansion in its fiscal Q3 earnings results at the end of April. However, perhaps the most exciting news to come out of the quarter was that the flash memory maker has begun signing long-term contracts. Sandisk has been a huge beneficiary of surging NAND (flash) memory prices, as demand has outstripped supply. This is the result of the big three memory makers cutting NAND production and ...