An initial roadmap for the Lightning calendar project has been created by Dan Mosedale. The document, which is currently rather sparse, sets out the basic plan for the Mozilla Thunderbird calendaring and scheduling add-on, specifying the aims for Lightning 0.1 (targetted for November this year), Lightning 0.2 and the future.

The roadmap states that Lightning 0.1 should have no dataloss bugs and be "basically functionally usable as dogfood" when working with local calendars and those accessed through WebDAV. There is a separate list of tasks for Lightning 0.1 available, which includes plans for nightly builds and at least one release candidate. Looking further ahead, Lightning 0.2 should have better integration with Thunderbird (including the ability to link tasks to emails and IMAP support) and offer improved CalDAV functionality. Plans for the future include localisation support, a way to cache calendars for offline use and device synchronisation.

The Lightning project was announced late last year as an effort to make Thunderbird more attractive to enterprise users. Refer to the Lightning wiki pages for further details.