FYI: Fixing your own Thermal Paste Problem
So if your cutting tape/removing noticable ammounts of paste, yes you warranty technically no longer exists.
HOWEVER, you can open up your MacMini and upgrade ram, HDD, etc. and they are cool with that.
Why I don't really know. It's a shame too, because I have my whole little set of tools and ArcticSilver 5 plus cleaner and solvent ready to go. Perhaps if everyone sends in the MBP for repair on this issue they will allow individuals to fix their own machines to reduce the load? Doubtfull.
Mac OS X (10.4.5)