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 Taiwanese component suppliers as saying that Nokia wants to replace the 5800's resistive touchscreen with a capacitive one -- the S60-based Samsung i8910 does that, by the by -- in an effort to better compete with its rivals. That would certainly make the device more usable and responsive, but in all likelihood, this isn't a simple matter of swapping out a component (how would you use that totally awesome plectrum, after all?) so we'd expect this to be more of an indication that Espoo's looking to move to capacitive going forward, particularly as it transitions over to the Symbian Foundation's builds.

Windows Mobile 6.5 to officially "launch" on May 11