The X1 is being built in the Magna Plant in Austria, it looks like the X1 will be available in Europe during the last quarter of 2009. Availability in the US is going to be spring 2010.
My dealer indicated that you can no longer order an X3, he is not sure what is the plan for 2010 MY for the X3.
The plant in SC just finished construction, it will take 6-12 months to get the facility up to snuff for production of the X3.
My best guess:
Annouoncement of the new X3 at the Detroit show in Jan of 2010 as a 2011 vehicle.
Start of production in SC second or third quarter 2010 as a 2011 Vehicle.