Simple (but effecive) workaround for dynamic AND selective orientation change in a UI(View|TabBar|Navigation)Controller

Orientation.m

/* Selective / dynamic UI orientation  
    Simply add this method (updateOrientation) to your class and call it in:

-(void) viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self updateOrientation];

}

...

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
    [self updateOrientation];
    
	return YES;
}


*/


// Huge hack !  Thanks to: http://goodliffe.blogspot.com/2009/12/iphone-forcing-uiview-to-reorientate.html
-(void)updateOrientation
{   
    UIWindow *window = [[UIApplication sharedApplication] keyWindow];

    UIView *view = [window.subviews objectAtIndex:0];
    [view removeFromSuperview];
    [window addSubview:view];
    
    [window bringSubviewToFront:self.view];
    [window makeKeyWindow]; // Don't forget to !
}