Starting with today's nightly builds of Sunbird, we will be taking an approach much more similar to Firefox and Thunderbird's nightly releases. That is, nightly builds of Sunbird will not carry with them the Sunbird name or icon, just as BonEcho does not carry Firefox's name or icon. Instead, they will be called 'Calendar' and use a more generic icon. Prior to official releases, we will flip the switch that again renames the builds to their official name.
Please file bugs on any places in the application where you still see 'Sunbird' showing up after today.
Thanks to the hard work of lilmatt and Rob Strong, nightly windows builds of Sunbird now include an installer by default. This means it will be much easier for us to ship installers for release builds, a very common request from users. There are still a few rough edges, but go ahead and test them out. Thanks again to Rob and Matt!