Happy Melon - I should have clarified how I thought this should be
implemented. I don't mean that any extensions should move locations -
the fact that everything is in one big /extensions directory is quite
helpful. I just mean that there should be some SVN settings so that
only users with a certain permission level can modify the code in
pre-specified directories under /extensions. I don't know much about
SVN administration, but I assume that you can restrict access in that
sort of semi-fine-grained way.
-Yaron