Marking this as part of our backlog. The votes and comments about how you would use this are really helpful, please keep voting/commenting if this is an interesting scenario for you.
An error occurred while saving the commentAnonymous commented
Our particular use case is to provide attributes to enterprise apps used for user provisioning. I would expect all available fields visible in the user profile to be synced, although first and last name should be considered a bare minimum. I would expect that the attributes are kept up to date, with a sync happening roughly every half hour. Personally I don't see a near real-time sync being necessary.
Hope that helps!