Is there such a thing or is there a way to update an entire

Is there such a thing or is there a way to update an entire site?
I'm building these custom sites for sakes teams and would like to update more than just a plug in or theme.
I would like to improve the site with new plugins, pages and graphics then update the entire site at one time.
Is that possible? Any feedback would be great.

Is there a tutorial on how to build a site with wpmu dev plugins that could compete with BP? If not we need to make one. That would be a great promotion for the WPMU Dev community.

Proud to be a WPMU Dev member
Richard