The only problem you may have is if lots of users write to the property at the same time. Then you might get a ConflictError. See:
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/zope-devel/DevGuide /Persistence.stx?rev=1.21&content-type=text/vnd.viewcvs-markup
for more information on conflicts. It won't be a problem as long as you don't hammer the property with writes.
-Michel
So, basicly it doesn't handle concurrency. Yes, multiple users can "view", but isn't that what a web server is supposed to do? The real issue of "concurrency" is whether it handles multiple users trying to write to a property at the same time. Obviously, the answer is no. It would be nice if I could find some way to "Lock" a transaction, similiar to ColdFusion's <CFLock> tag. Tommy