I found a "kind" of solution that may be generalized with you guys having trouble with Office. It will make office work again but not all your files may work.
In my case, this happened when using .MOV files on iPhoto, QuicTime, iDVD and iMovie. I supposed that maybe the last .MOV files I downloaded from my camera caused the EXC
BADACCESS (SIGBUS) on all four applications. Even when I did not open them, their sole existence and presence in my HOME folder make the four applications crash at opening (sounds like a virus isn't it?). However, these .mov files are not damaged or corrupted, and they do play smoothly in any Windows XP or Vista PC with Nero, VLAN or even Quicktime Alternative, so I call them the "MAC-neglected" files.
I created a new user and moved my photo and video library WITHOUT the MAC-neglected .MOV files. The applications work well again with the new user in my MAC. when I moved the MAC-neglected files to the new user, all the applications crashed again, so I clearly identified them.
Then, I deleted all my video and photo library from the normal user, I reinitiated the MAC and using an external hard drive moved the whole libraries back in again. All the four applications worked well again on my original user.
OFFICE CASE ANALOGY:
This MAC-neglected files causing a series of related applications to crash may exist on Office related files. I would suggest to do the following steps:
If you don't have time machine:
1) Copy on an external hard drive all the Office related files and (I know this is hard to do), divide them on separate folders by month, i.e.: JAN08, FEB08, MAR08, APR08, etc.
2) Create a new user as administrator, name it Office, for example.
3) Once you have a back up of all your files delete them from your original user.
4) Reinitiate the MAC.
5) You should not have any Office related files under your original user. Double check this!
6) Try to open an Office application, it should work. If it does not work uninstall and reinstall office.
7) Once office is reinstalled move the most ancient folder back in from the external hard-drive.
8) See if Office works.
9) Keep moving the folders until you find the MAC-neglected one, you should be able to identify precisley which file is the MAC-neglected one because after you copy it, Office will crash even if you do not open it!
10) Sorry to say this, but say goodbye to that file, as far as I can see with my .mov files it would never work on a MAC even though it works anywhere else. Get rid of it, and you should be able to keep working with your MAC (again, this sounds like a virus).
If you have Time-Machine
1)Make a back-up of your Office fiels on an external hard-drive.
2)Insert your MACOSX DVD while THE HARD DRIVE WITH Time Machine is connected.
3)Open the DVD and choose reinStall MAC OSX
4) NEXT be sure to choose "restart from time machine"
5) Choose a date where Office did work and start the process (it is long, more than an hour).
6) See if Office works --IT SHOULD.
7) Start moving your Office files from your external back-up drive (the one from step 1).
8) GO TO STEP 9 of the former list...
Good luck and God bless you!!!
(I bought two MACs in order to avoid this silly and f..king stuff which I innocently thought MACs were free of... Silly me!)