Yes, you can. Apple's online store sells Office v.X for Mac Professional Edition which includes Windows XP Professional. You can buy it with a Mac.
"Motorola makes the chips for them, who makes the computers?"
Motorola does manufacture PowerPCs, but Apple is switching to IBM's PowerPCs. Microsoft and Sony are also using PowerPCs for some of their future products.
"As does your need to use the Wintel shorthand and completely ignore AMD and other competitors."
I don't ignore AMD - I have a couple of computers with AMD processors.
"Drop the red herrings Hal, I've come to expect better from you."
Sorry if I've disappointed you, but after 30 years as a computer user, I just won't settle for a second-rate platform like Wintel.