According to Jukka Eklund, Project Manager
One hint: when you boot it up for the first time, let the system stabilize for some time before taking it into use. For the adventurous, you can also try the MeeGo Tablet UX image for N900, which remains in a very experimental stage.
There is also new Helium Mobile Browser included now for the first time, which is a Qt Quick light-weight WebKit based browser developed by Orange Labs UK. I Will give further updates after I've had a play 😉