We run our startup from two 15" MacBook Pros. For mine, I took out the optical drive and replaced it with a 1TB hard drive. Where the original hard drive went,

We run our startup from two 15" MacBook Pros. For mine, I took out the optical drive and replaced it with a 1TB hard drive. Where the original hard drive went, I put in a tiny SSD. This works great. OS and apps on the SSD, and I put the iMovie events and Aperture libraries on the hard drive. I don't know why Marco thinks that Time Machine wouldn't back up both drives, it does back mine up. I also think that Firewire is pretty important, as I backed up to external drives over USB for awhile and really have come to appreciate the FW800 port for that purpose. A Wedge shaped MacBook Pro would still be bigger than an air, and probably thicker, and I presume would have room for a FW port still. I don't see the need or reason to go to SSD only. The people who would be happy with that are likely to be happy with the macbook Air anyway.