I know I have asked this question before. It seams that no one knows what is going to change (if anything) on the 2008. Maybe the height adjustment on the seat??? Any ideas??
Here's a link to an MSNBC report that a new Prius is due in 2008 and a new and bigger pure hybrid due in 2009. http://www.msnbc.msn.com/id/19438532/
Whoever wrote that article was working off of old data. The new redesigned Prius has always been due out for a 2009 model year, but originally was supposed to be released in the fall of 2008. Now it is looking like spring of 2009 will be when we see the new redesigned Prius. As for the OP's question, there have not been any announced changes yet. I wouldn't think much if anything will change since it's the last year of the body style.