Alias - at the moment you can't run them at the same time, which is mighty inconvenient (must shut down one OS in order to switch to the other).
There is no MacBook 12". Do you mean the PowerBook 12" or MacBook 13"? Finally they brought black laptops back into business - I'm looking at the black MacBook myself for later (as soon as they change the idiotic keyboard design!!).
Every time I tell someone what I can do with my PowerBook and OSX, they're ridiculously impressed. For example, the address book is completely integrated into the OS, so your AIM client and Mail client can both reference it easily (Mail can tell you whether the person is online or not, plus you don't need to remember who owns what screen name, etc.). Combine that feature with the Spotlight search program (can Windows search every file, folder, e-mail, AIM logs, presentations, PDFs, etc
all in less than ten seconds?)
and I have people sold.
I still don't love the 'Book form factors -- put OSX on a Thinkpad and I'd be in heaven -- but the operating system is next to wonderful for the average user (as well as being capable for the power user too).
