My first impression of Zimbra is that it looks very promising! Many of my clients are deparately wanting to break away from Maximizer and ACT! The 2 main features they REALLY need are the ability to attach emails and files to contacts and to be able to start a local application to view a file or attachment. I know that Zimbra has Tags but can the contact list be used as a predefined list of tags such that they can be applied to specific email messages? Will there be a file manager with the ability to tag contacts to them as well?