Does it show the material when your render?
Press F9

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"I'm like a rookie paramedic to a siren, praying for an accident.."
Cute Is What We Aim For

If you want it to show up in the viewport, click the checkered blue and white cube in the material editor.

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[Link to www.3dprevis.com]

as Steve said, you need to check the "show map in viewport" button in the material editor.
But if you plan on texture it with procedural materials (no bitmaps) than you don't need to worry about uvw.
And if you plan on texture it with a bitmap image than you'll need an uvw, it really depends on what kind of shape is it, for box, sphere and other primitive shaped objects a simple uvw map modifier will suffice, for something a bit more complex you'll have to unwrap your model with uvw unwrap modifier.

here's a link i found searching on google about procedural materials.
[Link to www.everflow.com]

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The secret of creativity is knowing how to hide your sources.
-Albert Einstein