Simple Questions

well, Microsoft Office IS available for Mac, so you can just buy that and you won't have any problems with that.

I'm not sure about the DVD drives, but I think they aren't locked to a specific region.

And NO, none of Apple's computers have blu-ray.

 

Microsoft Word and Office have been made and updated regularly for Macs for... what, 20 years now, continuously? There have been three versions in the OS X era (.X in 2001, Office 2004, and Office 2008). The last of the three is Intel native / universal binary; the other two are PPC (2004 at least runs on Intel processors but it'll be somewhat slower in some aspects). Compatibility with Windows documents is fine (if your office-mates use the new XML Office formats, your best bet is definitely to stick with Office 08).

Some people who are really used to Office in Windows occasionally also choose instead to run Windows (usually XP) in Parallels or VMWare and run Windows Office 2003 or 2007.

The DVD drives, which are not Blu-Ray, are region-locked. There are some tools you can possibly try to unlock the region, like this:

http://www.powerbook-fr.com/dossiers/dvd_region_free_en_article30.html

It looks like they don't have a firmware for the newest "Unibody" aluminum Macbook / MBP's, though.