Great news that Tiger has been announced and shipping before 29th April! I've just been checking over the pages at apple.com and I notice on the store it says in the box is a DVD. On the requirements page (http://www.apple.com/macosx/upgrade/requirements.html) it says slot loading iMacs are compatible with Tiger but I dont see how if only a few slot loaders had DVD Roms? I'm abit confused. My mac meets the requirements but I only have a CDRW.