I'd guess the Yaris price has not been 'adjusted' yet, there is no 2009 model on the website.
Change the Corolla from 2008 to 2009 and the price drops by up to 2 grand, right at the start.
There's also been an anouncement that (in the States, at least) all 2009 Yari will have ABS and side airbags standard.