So, I've created a CLLocationManager, called it to start updating, set mapView.showsUserLocation to YES, and returned nil for the userLocation annotation.
Here are some snippets from my code in my UIMapViewController: 

```
- (void)viewDidLoad
{
     CLLocationManager *locationManager = [[CLLocationManager alloc] init];
     [locationManager startUpdatingLocation];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{ 
 CLLocationCoordinate2D userCoordinate = locationManager.location.coordinate;
 [map setCenterCoordinate:userCoordinate animated:YES];
 [map setShowsUserLocation:YES];  
}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{

 MKAnnotationView *mapIconView = (MKAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier:@"mapIconView"];

 // Don't mess with the user location annotation
     if (annotation == mapView.userLocation)
              return nil;

    // etc.
}     

```

This all seems pretty straightforward. Everything works fine--the map zooms to my location as it should, and I've confirmed that all the methods are called as expected--but no blue dot. Can't get the blue dot for the life of me, no matter where or how many times I say

```
mapView.setUserLocation = YES;

```

What am I missing here?