http://www.scottwax.com/scott/services.htm He's worked on plenty of high-end cars and charges a very fair rate. Certainly has the experience you need/expect for working on f-cars. He hasn't detailed my car yet but I can vouch for his work being awesome, check the site out.
I too have heard great things about his work, and the pictures prove it, very very impressive work, $175-$250 for a full, 4 hour detail, inside out.
I would like to refer you to Brian Burris. He works the internet dept. at Moritz BMW and has been detailing on the weekends for a number of years. He comes to your house to do the detailing and does a very good job. I know of about 6 or 7 Ferrari owners who have him do their cars regularly. He can be counted on to do your car in strict confidence and will treat it very carefully. I have known Brian for about 7 years and recommend him totally. He can be reached at Moritz BMW, (817)436-5700. Tell him that James Dunne asked you to call him. He has enough clients now that he is being selective about who he tells he will do work for.