Dell XPS 8900 - Delivery Date Changed Twice (and still not here)

I have been a Dell customer for many, many years and have never had a problem with order deliveries until now.  I ordered a Dell XPS 8900 special edition on 7/16 and have had three different estimated delivery dates posted on the websites (all wrong), the latest of which was today.  I have been in contact with customer service and told of a parts shortage (after placing the order of course).  This is highly unlike any experience I have ever had with Dell.  Is anyone else experiencing delivery delays and inaccurate delivery estimates, or am I just "lucky"?