According to Walt at AllThingsD.com, there are many significant differences betweent the two machines (cost, DVD options, GPS, etc.), however, the choice between MacBook Air and the ThinkPad largely comes down to whether you want Leopard or Windows XP (or Vista - ha!).
He states:
There are two more factors worth mentioning. I believe that both the Mac operating system and the software that comes with it are superior to the Windows operating system and built-in software offered on the ThinkPad. And the Mac isn’t susceptible to the vast majority of viruses and spyware, and doesn’t require third-party security software.
Also, the ThinkPad’s scr
