Amazon's a mixed bag. MP3 downloads that you purchase (not stream) are DRM-free.
Kindle content has DRM. Not sure about video purchases, but I believe they have DRM.

I'm the same. TabGroups is very hard for me to live without.

Did you find anything usable for Chrome? I'm trying out TabsFolder currently, but the inability to move tabs around between existing groups is making it barely useful for me.

I use TabGroups to context-switch between different work projects, different personal research projects, etc. It makes my work day SO MUCH easier to handle.

I'd be open to totally different approaches to my problem - how to stop using a bunch of websites, easily switch to doing something different, and easily switch back later. And move things from one group/context/session/whatever to another. It doesn't have to look or feel like TabGroups as long as I can switch contexts relatively efficiently. It doesn't necessarily have to preserve per-tab history, though that is sometimes convenient.

Yes. We really should move beyond the idea that knowledge transfer is the fundamental element of teaching, and that students are passive recipients of knowledge.

The best teachers are those that help students teach themselves.

PyCon 2013 was my favorite conference I've ever attended. This incident has been overreacted to by everyone from Richards on down to the hordes of trolls getting on her case. There's some food for thought here but jesus christ people, calm down and use your brains a bit.

Clarification: Cinnamon isn't "the fallback mode," by which I think you mean the thing variously referred to as "GNOME Fallback" or "Gnome Classic"
(I can't keep the terminology straight either, maybe this will help: http://askubuntu.com/questions/83351/which-is-correct-gnome-classic-or-gnome-fallback ).

Cinnamon is like the fallback mode in that it builds on Gnome 3 while attempting to feel familiar to Gnome 2 users. But it's a different codebase worked on by different people (http://en.wikipedia.org/wiki/Cinnamon_%28user_interface%29)

You are correct that both Cinnamon and "fallback" still lack quite a bit of Gnome 2's functionality. I'm keeping a hopeful eye on Cinnamon, but still running Gnome 2 indefinitely.

New York's 2nd Avenue subway started construction 40 years ago, after first being planned 83 years ago.
And yes, the project is currently under construction (again).
http://en.wikipedia.org/wiki/Second_Avenue_Subway#Background

I am a free man!

(paraphrasing Patrick McGoohan)