Today marks a new update for the N97.  While the unit has not been out that long it has been slowly receiving multiple updates since its release.  While there isn’t a change log available I can only imagine that this update will improve C: memory, as well as give minor tweaks in performance.  Keep an eye out for an update when the full change log is released.  The update can be performed from the phone or via the NSU.  It will vary from model and region.