Summary: is there really any difference between this "Gaming" 2.0GB MS Pro Duo and other 2.0GB MS Pro Duo sticks? i can't really tell, at least not from the product description on Newegg, nor from the product packaging.
Pros: bought the SanDisk Gaming 2GB MS Pro Duo for my Sony Ericsson w810i phone. took it out of the package, put it straight into the phone, and started taking & saving photos. no problems whatsoever.
Cons: the phone recognized 1.9-something GB -- not exactly 2 gigs, but i'm not surprised by this. besides, 1.9GB is more than enough for most needs.