Some simple Inkscape tutorials, that walk you through using some of the tools available to make some nifty things.

Inkscape video tutorials from programmer-art.org.

Another Inkscape tutorial, similar to the last.

An inkscape tutorial in... Dutch? I'll have to hit Babelfish to translate it, as it looks very interesting and useful.

HowTos on some more complex inkscape effects.

Another inkscape video tutorial.

An inkscape video tutorial. I'm looking forward to viewing these.

Inkscape is a vector drawing program similar in functionality to Illustrator. Works on the big three platforms, and isn't too hard to use once you actually read some docs and practice with the interface.

A nice guide to the Inkscape vector drawing program. I'm quite enamoured with this program, having gotten part way through the tutorial and managed to make some pretty looking graphics. Easy to use once you understand it, I think.