ClubLexus says it's official. Here's the link to the official release statement.
http://www.clublexus.com/forums/showthread.php?t=328802
Pricing
Lexus’ high-performance IS F sport sedan will be competitively positioned with a base MSRP of $56,000. With this strong base MSRP, the IS F will be an outstanding value versus the competition.
An IS F with navigation will be priced at $59,315 including DPH fee.
IS F Optional Equipment MSRP
DVD Navigation System $2,550
DVD Navigation System w/ Mark Levinson $3,990
Pre-Collision System w/ Dynamic Radar Cruise $2,850
Intuitive Park Assist $500
Headlamp Washer $100
F-Sport Performance Accessory Line
To extend the impact of the overall F performance story, and to bring more performance and personalization opportunities to a wider range of higher volume models, Lexus will introduce F-Sport, an all-new performance accessory line available for the IS 250 and IS 350. The F-Sport performance accessory line will provide enthusiasts the opportunity to modify their IS 250 or IS 350 with components engineered by TRD and fully covered by the Lexus factory warranty. This line-up of dealer-installed products, including full suspension kits, aggressive exhaust, larger diameter brakes, 19” forged alloy wheels, and more, will be available in April 2008.