Following a long (and fascinating) discussion on the ShiftSpace list, we have come up with a license for the source code of ShiftSpace. This is the short version of it:

ShiftSpace is distributed not only under the GNU GPL license, but also under the GNU LGPL and the MPL licenses. (just like the Mozilla Firefox browser itself)
This means that you are free to use and redistribute ShiftSpace under the conditions imposed by either license, or all, for that matter. You may thus choose to build applications of your own that heavily borrows code from ShiftSpace and license it under GNU GPL, or, if you prefer, use the code under the terms listed in the MPL license.

I am posting the license here for now but will soon hook a link to Trac - an online SVN based project development system we are currently working to install on the server. When we do that, the open sourcerers of you will be able to easily browse our code, and all the rest of us will be able to enjoy a better issue tracking system (better than the current Google Code system)

in the meanwhile,

enjoy the weekend.

Trails is the upcoming main addition to ShiftSpace it is an an interface for mapping information in the world of ShiftSpace. the idea is that shifts (ShiftSpace annotations/interventions/user-generated-content) left on different pages will be trailed together into information maps. We have been drafting tons of mockups, trying to figure out how should it work, what would be compelling to use? What would be a way to sculpt Trails in a way that would facilitate the potential we see in it? What would be feasible to execute? What would be flexible enough to iterate on as we develop? and so on…