I voted "wait," because I hardly ever run out and buy the newest OS right off the bat. I was going to make an exception, so that I could update both my iMac and my G4 Macbook to Leopard (my 'book is currently still running Panther, and therefore won't run iLife '08). However, since it appears that Leopard won't run on my Macbook (it's only 800, not 867), there isn't any real need for an immediate update (especially since I'm going to have to buy Tiger for my 'book as well as Leopard for my iMac).