Thereby immediately voiding their warranty and perhaps some other arcane Apple usage restrictions.I think you're confusing Apple with Newegg, with a Lenovo laptop running Windows. LINK
I use a MacBook Air as my primary machine. It's more than fast enough for everything I do (mainly software development), it's very portable, very solid (no worries about it warping if I pick it up by one edge), and it allows me to "legally" run every operating system I might need to use.
Sure, it's more expensive (but not so much when compared to other laptops with the same features/specs), but so are Snap-On tools compared to Chinese junk they sell at Harbor Freight.
Update: Newegg tells us that, oops, this was all a terrible mistake.
http://consumerist.com/2012/06/newegg-no-well-totally-take-returns-after-you-install-linux.html
Apple will not take returns unless the system is returned in its original condition with its original OS.
If your Apple is fast enough, you can run Linux as a VM guest in Apple’s Boot Camp.
Fair enough.