Sure Linux just works... but your presentations on a shiny Mac Book Pro will be all the slicker than a boring old Ubuntu Dell. Besides, not staring at an ugly UI all day has its advantages as do the rest of the Mac productivity features.
Boring old Dell? :) Please... Ubuntu runs on a best laptop ever made: black matte military brick-rugged ThinkPad T61 with a keyboard that most desktops only dream of, equipped with duplicated mouse buttons up and down and a mouse "pin" in addition to the touchpad.
This is as close to true mobile productivity as you can get, looks bad ass too.
The only unfortunate feature on it is the "Win" button, but I configured it to do "Expose" and "Ring Application Switcher" effects.
Jesus... did I just write that? I'm such a geek. :-)
