Just wondering.
You mean you have a 32 gig on reserve, and you want a 16 gig instead?
I'd say... get there early. I don't think you'd have a problem, as 32 gigs are more popular than the 16's.
I called my local apple store to see if they received white would they allow people who reserved for black to switch. The saleslady then told me that HER stores policy is "you get exactly what you reserved, if you want something different you have to get in the walk in line". Could differ by store, but your best bet is to call.
Just wondering.
GOOD. That's the way it should work. White wasn't available for preorder, so I didn't reserve a black one in hopes of exchanging or returning it for a white. So if i wait outside my Apple store for hours before they open, and they have limited white, I'd be pissed if reserve people are swapping them in their line. Get to the back of the line.