Zimbra purchased by Yahoo

Zimbra who make the Zimbra Collaboration Suite (or ZCS) have announced they've been purchased by Yahoo.

ZCS is an Email/calendaring/etc suite with support for standard mail protocols and also plug-ins for Outlook etc. It also supports Microsoft's ActiveSync for over the air push Email.

ZCS comes in various flavours including an open source edition and they've stated this will continue to be the case even after the Yahoo purchase.

ZCS is a reasonable UN*X based competitor to Microsoft's Exchange, maybe Yahoo will give it the market distribution it deserves.