Adobe does not intend to make a commercial offering out of
JamJar to the best of my knowledge. I have been using it for work
related collaboration for the past several months and it has been
quite helpful. I just make sure that the content I store up there
is stored somewhere else as well.
Realize that the Notifications feature is not functioning
most of the time - so you have to manually let folks know when
changes have been made to the space.