Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
The Mozilla Foundation has published an initial roadmap for 'Lightning', the project to integrate its calendar application Sunbird with its email application Thunderbird. Sunbird has been available as a separate extension for Firefox and Thunderbird for a while, but there's been little integration between calendar and email functionality.
The team working on Lightning — a code name, rather than an official product name at present — hope that the integration of scheduling and tasks with Thunderbird's email capabilities will make the combined application more attractive to corporate users, although they're not specifically targeting Microsoft Outlook.