Articles and tutorials
Inkscape has a number of official tutorials, which the developers helped create, which teach you about the software. You can find these here: http://inkscape.org/doc/index.php?lang=en
However, you might like some other self-guided tutorials. You can find some in these locations:
- Inkscape Tutorials weblog: http://inkscapetutorials.wordpress.com/
- Floss Manuals: http://en.flossmanuals.net/Inkscape/
- 35 Tutorials to create amazing Vector Graphics using Inkscape: http://speckyboy.com/2009/04/28/35-tutorials-to-create-amazing-vector-graphics-using-inkscape/