Shares of Apple Computer hit yet another 52-week high in trading this morning. That's the third day in a row it's touched new annual highs. I'd like to think that my story in today's Globe (Apple climbs to 52-week high on product news) helped fuel investor excitement but something tells me investors are likely more excited about some new product news. The company announced that all of its G5 line of Power Mac desktop computers will be equipped with dual 64-bit processors. Most PCs you buy nowadays have just one processor that computes 32 bits of data at a time. Going from 32- to 64-bits of data doesn't just double a processor's power, there's an exponential increase in its ability. In short: The new G5s will be some honking fast machines. Mind you, Apple still needs to get more software vendors to port their apps to run in a 64-bit environment. On the Windows side of the world, Advanced Micro Devices makes 64-bit processors.