Hmm indeed, I just checked, the 0.8 jaunty package lacks the 2D Drafting module. How crazy that nobody saw it before!!!
Anyway, it's easy to fix. Download the 0.8 source package:
Then, extract it, then copy the "Draft" folder (inside src/Mod) into either /usr/lib/freecad/Mod/ either your_home_folder/.FreeCAD/Mod/
That's it, you should now have the 2D Drafting module available.
Note that the tutorial can refer to features and tools that are not in the 0.8 version... Just one or two month patience!