LifeInVector has a great Adobe Illustrator Gradient Mesh tutorial available. The tutorial is a downloadable PDF/Illustrator file combo, and covers the use of the tool quite well. 
If you’re looking for more, check out this list of 40 great Illustrator tutorials at Smashing Magazine.
Tagged: gradient mesh
Illustrator Gradient Mesh tool quick tutorial
The folks over at aiVault have a great intro tutorial on Adobe Illustrator’s Gradient Mesh tool. The Gradient Mesh tool is used to create a single multicolored object on which colors can flow in different directions , the color transitions achieved are smooth running from one color to another.
Intro to Adobe Illustrator’s Gradient Mesh tool
Ever wonder what you could do with that Gradient Mesh tool in Adobe Illustrator? It’s one of the most powerful, and yet underused tools in the program.
Here’s a great little tutorial to get you started: Magical Butterfly’s Mesh Tutorial.
Illustrator Gradient Mesh tutorial
Life In Vector has a great tutorial on using the Gradient Mesh tool in Adobe Illustrator. It’s available on the download page, and is about a 1.3MB PDF file. You can also view some of the fantastic illustrations, like the car above, done completely in Illustrator.