Microsoft vs. Wine: Deja Vu on the FUD Front describes how Microsoft's WGA stuff - checking a legal system software according to Microsoft's definition even for updates for normal applications - makes the update of applications that run under Wine or Crossover Office (Windows emulators under Linux) impossible.
Let me spell that out for you: You can have a legal copy of Microsoft Office, and because you choose to run it on a Linux box using Wine, you won't be able to update it.