I see the thread on the NSA spying was closed, and understandably so seeing as it was veering towards the political side of the topic. What is really interesting about the Prism spying topic is the way it is focusing people's attention on the more private and secure alternatives that can free them from the dodgy services provided by the giant corporations. I would like to point the forum readers' attention to following site, which shows lots of alternative software and services that protect your online privacy: http://prism-break.org/
I think this is an uncontroversial way of treating the NSA/Prism spying scandal on Talk Graphics, as it deals with the technological side, and not the political side, and people can share their tips and tricks for flying under Big Brother's radar.
Another useful link is this one to a short and clear manual instructing one how to configure Thunderbird for mail encryption: http://www.flossmanuals.net/thunderbird-workbook/

Regards,
M