The latest version of Zimbra, a piece of open-source e-mail server software recently bought by Yahoo!, now supports BlackBerry Enterprise Servers. Zimbra’s been rocking Windows Mobile, Palm, Symbian, and iPhone devices before version 5.0, but it’s bound to take awhile to develop something of that magnitude without any help from RIM. Of course all the talk about Microsoft acquiring Yahoo! seriously leaves Zimbra’s future in question. You can download a trial of the BlackBerry connector here, the mobile client here, and the server software here.