The new 5800 v40.0.005 firmware supports the enhanced home screen used on the 5530 (scrolling contacts list with up to 20 entries), as well as kinetic scrolling and auto-switching from T9 to QWERTY when you rotate the phone from portrait to landscape mode.
It's pretty much what 5800 owners have been dreaming of since we first got the phones. Or so I've heard, because, as usual, NAM is not supported by the update servers. According to Navifirm only RM-356 product codes are getting the new update (APAC/Europe).
So I guess we wait, as usual...

And yes, I already thought about trying the altered product code trick. It won't work since NONE of the NAM product codes are supported.