They are in production now and delivery is expected in USA the last week of May. Your dealer is ordering them now. Looks like only options are wheels and Adaptive cruise. Below is pricing:

2010 MY XK
Effective February 19, 2009
Suggested Retail Price
XK Coupe $82,150
XK Convertible $88,150
XKR Coupe $95,150
XKR Convertible $101,150
Destination & Delivery $850

Options Model
Derivative
19" chomed-Artura-style Wheels with runflat tires All $1,400
20" Kalimnos-style Wheels All $5,000
20" Nevis-style Wheels XKR $5,000
HD Radio XK $ 300
Advanced Technology Package includes Adaptive Cruise
Control and Active Front Lighting $2,500

Note: Prices and specifications are subject to change without notice.