Ok so I'm getting ready to order my MP in a week or so. Waiting to see what kind of updates we get in some other products tuesday before ordering. Order once, just makes life easier But I have some questions. I don't "need" a second optical drive right now... but will I be able to add a second drive in the future in that available bay? I'm thinking bluray or hd-dvd after prices come down a tad bit. But I am not familiar at all with how the "power mac/mac pro" do those types of upgrades. I'm more familiar with the portables.