I’ve been experimenting with how we can use tabs inside Thunderbird.

The previous tabbing post already discussed how tabs help people to keep their current context and multi-task more flexibly.  I’ve created a number of designs that look into using tabs in Thunderbird so email users can have the same kind of power over their context.
In [...]

Email idea #43819
I would like to be able to tag messages or threads of messages with calendar events or tasks.
My tagging scheme breaks down into these types: (with examples)

Project: thunderbird, evince
Discussion: desktop-devel, firefox-journal-devel, moz-bugs
Temporal: meeting with david, thunderbird alpha1 deadline, and tabbed interface wiki page task

Project Tags
These are used to tag messages related to a [...]