Yet another wood shader, but this comes with a twist: I decided to start a blog, and this shader is the result of my very first tutorial! It's a multi-part tutorial with a lot of explanation of the details. If you'd like to learn about one way to make wood in Cycles, I invite you to check out my blog to make this shader yourself! I welcome any feedback on the tutorial, but please don't clog up blendswap with comments here...send me email via the "sizzler@" link on my website!
If you're not interested in learning then please just download this shader and use it as you wish. Otherwise I look forward to seeing more great wood shaders from the community.
As always, the material ball is from JC Levet (although I modified the scene to remove stuff that is out of camera, removed bubbles in the glass, and the subsurf indicators): http://www.blendswap.com/blends/materials/galvanized-steel-shader/