We’ve just got the MacBook Air available to order at our place and it’s looking rather sexy. (note the subtle plug :) It’s probably just a matter of time before the other laptop manufacturers in the PC market start removing optical drives too, although security issues will possibly arise from purely wireless installations. But the thing that has us really excited about the MacBook Air is the shift towards solid state hard drives; providing you can shield them from unwarranted EM, they should be emerging soon across many more products. It’s really more than just a thinner MacBook - it’s a risky and admirable step where no laptop has gone before.