Ordered mine end Sept 09, dely quoted Jan 10. When this didn't materiaise, the dealer offered my a "nice" car for the weekend. Unfortunately there were no GTI's available so I took an Audi A4 S-line (210PS) for the weekend. Nice car but the power delivery was not as smooth as the GTI.
I agree with others comments, you should ask, demand and if all fails beg! They should offer you something as compensation for the ongoing delay.