It's certainly not unheard of for Nokia to take existing models in its lineup, tweak 'em with slightly improved hardware and software, and re-release them -- see the N85 / N86, N93 / N93i, N95 / N96, and so on -- so we can totally buy that the company's hard at work at updating its 5800 for a future revision. DigiTimes (which admittedly doesn't have a pristine record for nailing these sorts of rumors) cites "sources" with Taiwan
