I have just picked up my new 2008 Spec 450h SE-L. I priced the car on www.drivethedeal.co.uk and the Lexus dealer matched this after speaking to Lexus Corporate - £ 39,500 on the road against a list price of £ 45k !!! I have seen 1 year old cars on the forecourt for the same price.
I secured £ 2k off the wife's Prius using drive the deal !!
I am not involved in the site at all - these are genuine discounts available from Lexus & Toyota dealers