"Tycho" from Penny Arcade was talking about how pleased he is to be able to run his choice (or all three) of the popular OSes on a single box, and I entirely agree. Having options is a good thing; it keeps the vendors honest - nobody likes a monopoly (nobody likes somebody else's monopoly, I mean). So, kudos to Apple for having a laptop that doesn't chain you to a single OS vendor. If only you could go back in time and have a tower workstation where there are a variety of motherboard manufacturers, providing market pressure and lowering the price.
Donations to the "Dave needs a heavy piece of machinery for his iTunes fix" fund can be made at the door. They're tax-deductable if your accoutant's not ethical.