Speculation aside, this isn't the first time. There have been several times I've seen this same issue many times from others here, and on various mailing lists (and experienced it myself). Sales at Zimbra (aside from two people who are long gone) have always been difficult to get in contact with, which is unfortunate since its such a great product. It is something that I hope Telligent SERIOUSLY addresses now that they own Zimbra.
Hopefully they'll integrate Zimbra sales completely into Telligent's own sales division. A company focused on social networking will know the bad press that sales folks being incommunicado causes.
State University of New York at New Paltz