Nokia continues to roll its firmware juggernaut and the latest device to benefit from it is the Nokia N85. With the latest update, the device now moves to the v30 software which should be available via both the NSU and OTA.
As is the case with both Nokia firmware releases, a changelog isn’t quite available. However, you can go and update without the fear of loosing any data as the device supports user data preservation. One thing that Nokia has been doing recently is blocking the ‘hack’, so if you are interested in that sort of thing then it might be a good idea to hold off.