For those who don't know, the HS250h was just unvieled to the US. It will fall between the IS 250/350 and ES350 in size. It will be powered by a 4 cylinder engine and paired with electric motor. We should see them in the dealers by summer. If you want to see more of it, check out this link:
http://www.autoblog.com/2009/01/11/detroit-2009-lexus-hs250h-worlds-first-dedicated-luxury-hybri/
http://www.autoblog.com/2009/01/11/detroit-2009-lexus-hs250h-worlds-first-dedicated-luxury-hybri/