So, let's assume I use a laptop and I'm a big fan of Zimbra. I run into trouble with my ability to access the internet while I'm away from any decent Wi-Fi hotspots and my UMTS/EVDO coverage is non-existant.

Does this mean that I can not access my email or contacts at all? I'd like offline support so that I can ensure that I never lose the ability to pull up my calendar or contacts.