Newegg has a bunch of discounts available in their "Anniversary Sale" section including
some very good pricing on DDR2 memory.  Corsair XMS2 memory in the same configuration
is just $37 after rebate with FREE shipping and Patriot 2GB (2 x 1GB) PC2-6400 800Mhz
memory is just $36.99 after rebate! 

ANNIVERSARY SALE AND MEMORY DEALS