If you are using AdWhirl and want the ad to slide in from the bottom of the screen when your View loads, use this snippet:
- (void)viewDidLoad
{
[super viewDidLoad];
AdWhirlView *adWhirlView = [AdWhirlView requestAdWhirlViewWithDelegate:self];
adWhirlView.delegate = self;
adWhirlView.frame = CGRectMake(0, 430+kAdWhirlViewHeight, kAdWhirlViewWidth, kAdWhirlViewHeight);
[self.parentViewController.view insertSubview:adWhirlView belowSubview:self.view];
[UIView beginAnimations:@"AdWhirlIn" context:nil];
[UIView setAnimationDuration:.5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
adWhirlView.frame = CGRectMake(0, 430, kAdWhirlViewWidth, kAdWhirlViewHeight);
[UIView commitAnimations];
}