prevention of publishing

Not being able to prevent some users from publishing is a problem. I’ve found some discussion of this in the forums. But my questions are:

- has anyone worked out a tweak or a hack to allow some users to create & edit & save but not publish?

and

- is there any chance that this will be in the next version?

not a showstopper, but something that seems pretty important in general for any CMS

TIA

May be in the next release 0.9.2
http://modxcms.com/bugs/task/203?histring=publish&tasks=last