Instant OGo 1.0.5 just got released. Providing an inexpensive CD which installs a complete OpenGroupware.org server it is probably the easiest way to get an up-to-date OGo installation including a mail server and more.
This release features an improved administration interface which displays the status of configuration changes inline instead of sending a mail. Existing I-OGo customers receive the update automatically using the maintenance service.
[instant OGo]