I totally agree, SONY does charge an arm and a leg for their memory.
The SWISSBIT memory isn’t that badly priced for 1GB of RAM and when i checked, the shipping rates were not bad either. It was only $20 for shipping and handling to the US.
I am still debating upgrading, becuase when I used CPU-Z to see exactly what chipset was on the motherboard. I come to find out that it is a i852GM. I checked the specs at INTEL and they are horrible. That chipset will only run, any MICROdimm memory, at only 133mhz.
More RAM will always help, but with an outdated chipset running at 133mhz I am not sure that upgrading would make a large impact from the 512MB I already have. The money would, probably, be better invested in trying to obtain a newer version of the motherboard with a better chipset. Or saving for a new notebook.