Your argument seems to imply that the existence of even one deflationary good is sufficient to destroy an entire economy. Surely if this were the case then the law of large numbers would have killed us by now.
My understanding is that one good wouldn't do it, but persistent, overall deflation would in fact devastate the economy.
Sure, right now you can stick money under a mattress for 6 months and buy more Core 2 laptops than you could today. But that doesn't seem the same as "getting richer".
Where's the line? Good question. Obviously if you could buy more of anything that would be getting richer without investing the money. Or if you could buy more (houses or food or cars or Internet access or electricity or sex or drugs or rock n' roll).
We've started a habit of creating periodic Bitcoin threads to confine discussion thereof to those threads and prevent excessive proliferation of Bitcoin topics in the discussion section. Here is a link to the last one, which links the other discussions. Lot's to talk about, and another bounce in Bitcoin's value (up to 33 then down to 24), so share your links and thoughts!