The name is taken from the sky in a painting featured in the movie. The movie Vanilla Sky is a remake of the Spanish movie Abre los Ojos (Open Your Eyes) which is a really good movie.
If you use your own car for business, you will be able to claim 45 pence per mile for the first 10,000 miles, and then 25 pence per mile for each mile thereafter. These are tax free and known as Approved Mileage Allowance Payments (AMAPS).
Per employment, not per vehicle. The current rates (as of 2011) for mileage allowance are 45p per mile for the first 10,000 miles and 25p thereafter. This applies to each employment, so if you have two employments either concurrent or consecutive you will potentially receive two lots of 10,000 miles at 45p.