As far as we can tell, Apple hasn't done a thing to iDVD '09 to differentiate it from iDVD '08. Not even a few fresh templates. In fact, they left the 'iDVD' off of the side of the box, like it didn't exist anymore. Is it EOL'd?
We know Apple doesn't care much for the bag o' hurt that is Blu Ray disks. In fact, a DVD player doesn't even grace the AppleTV or MacBook Air. Optical is definitely on the decline in Cupertino.
As a side note, Apple had also removed iTunes from the iLife package as of iLife '08.