Sony did the right thing with their new A100 dSLR. They put a CF slot in it but are including a MS to CF adapter. Everyone who already has a dSLR and would be purchasing the A100 likely has some CF cards so they're happy. Any prior Sony users can still make use of their silly MS so they are happy too. It's a win/win. The same thing could likely be done via a xD to SD adapter. It's a bit trickier since xD lacks a built-in controller, but I'm sure someone is smart enough to figure it out.
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Nick
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Nick