I've just learned that open source collaboration vendor Open-Xchange is set to announce on Thursday AM that it will be available to iPhone users.

Open-Xchange offers an open source alternative to Microsoft Exchange and competes against other open source collaboration plays including Scalix and Zimbra. Zimbra has offered iPhone integration for nearly a year at this point, it's not clear at this early stage whether or not the Open-Xchange iPhone offering will offer the same (or greater/better) degree of integration with the iPhone.

Overall though - good news for both iPhone and Open-Xchange users indeed as this further expands choice for both camps.