I work in a campus environment, and am researching various options to provide our users with a unified communications solution. We are on the cusp of replacing or upgrading our PBX and voice mail. We are also looking at replacing our email system, and are looking very closely at Zimbra. I'm wondering if there is a way that the two replacements could be combined in such a way as to provide us with unified messaging, or even better, unified communications. Thoughts?