This feature has not been discovered by you guys and gals because there hasn't been a firmware update available yet for N82 (don't worry the first N82 firmware update that improves the stability of key applications is in the pipeline and will be available soon). Since this is the first time user data preservation has been implemented in an Nseries, if you run into any problems with an installed application not working or missing files please leave a comment here and I'll pass on the problem to be looked into, or if you prefer send me an E-mail at kevin.korpi@s60.com with all the details (application name, version, where to download the application, etc.).
Full details at the Nokia S60 Blog .