I was able to get my updated order print out from my dealership today which includes new dates:
Accepted Build Date 5/1/13
Current Planned Build Date 5/1/13
Factory Complete Date 5/22/13
Accepted Delivery Date 6/25/13
Current Planned Delivery Date 6/25/13
Note that the anticipated delivery date given to me on my January order has not changed, but they now have listed the actual build dates.
I also noted my engine number, chasis number, registration date and VIN are not listed, but Jag Corp says that is normal. They noted that my order should have a "Last Date of Order Change" which is shown as 4/9/13. I was told that after that date NO CHANGES can be made to the order and that the parts would be assigned and pulled to place on the assembly line.
It looks like things are going according to the original promised dates.