Aggregates a user's profile nodes into one.
You have several different pieces of profile information about your users regarding to their work, eating habits, leisure time, and so on, all of which are considered to be semi-private (ie. may be hidden from eg. unauthenticated users). You may want to make (some part of) their profile data merged into one node per user, possibly with some considerably different layout and/or access control. You have set up different content types: 'work', 'eating', 'leisure', and 'public_profile', all of them set up with Content Profile module--but how to merge the first three into the fourth?
Here comes profile_aggregator.module handy. Just select the source profiles ('work', 'eating' and 'leisure'), select the target profile ('public_profile') with the appropriate format, and let the users update their pieces of profile information while having Drupal do the merge part of the work!