Main thing about PR 1.1 firmware update is in switching between landscape and portrait mode. Yes, finally we got it but in lite version because switching works only in browser. This is great thing to wide range users who using N900 especially because of its excellent web browsing capabilities. Enter the browser and only hit Ctrl + shift + O to turn on, you can easily turn off this behavior by again pressing Crtl + shift + O.
Here is video sample of browsing in portrait mode.
We are hoping that full portrait mode will available soon.