Lots of PC news flowing out of Sony Electronics' US headquarters this fine Sunday morning. First, the company slashed the starting price of the 13-inch VAIO SA laptop from $1,250 to $1,000, while the lower-end SB series now starts at $780 (it had been going for $800 after instant savings). We asked Sony's PR team what that means for folks who recently purchased either of these through Sony's online store, and still haven't gotten a response, but the company was quick to remind us that it's up to retailers such as Best Buy to set their own