This one is interesting, straight from
Engadget:
"Sony execs, who always make the right decision about everything, are thinking about bringing the Clie back to the States, only this time running on the Pocket PC or Symbian operating systems. Not entirely impossible, but with the overall market for PDAs flat (and/or shrinking depend on who you ask) it seems like if they’re gonna get back into the game it’d be with some kind of high-end Sony smartphone (which would make sense if they’re considering the Symbian OS, though how they’d avoid directly competing with Sony Ericsson is beyond us) or maybe some kind of multimedia handheld like the ones HP is currently pimping."
In fact,
I am convinced that Sony Ericsson is already squinting at Symbian. It is the currently best OS which offers PDA-capability to mobile phones. On the other hand, I don't think that Sony is really thinking about turning their infamous Clie series into Pocket PCs. Think about the immense R&D expenses this step would require. And from my understanding, Sony abandoned the Clie because it didn't want to compete against its most profitable business unit, Sony Ericsson.