I did not create this tutorial - I take no credit.
Create a new layer and select the polygonal marquee tool. Make a shape similar to the one shown here (around 180 pixels high). Go to select > modify > smooth, enter '25' and press ok.
Set your foreground color to #D0D2C7 and fill the selection.
Open the layer styles dialog for your layer and go to 'inner glow'. Use the following settings...
Blend mode: normal
You can leave the rest of the settings as default. Go to 'inner shadow' and set the inner opacity to 44%, size: 7, and distance: 8. Then Click 'ok'.
Create a new layer. Select the Elliptical Marquee tool and and set the mode to 'intersect'. Draw a circle over your already selected shape, so you get something similar to what is shown on the left.
Fill the selection with #FFFFFF and set the blend mode to overlay and the opacity to 40%. Press ctrl+D.
Hold down ctrl and click the layer 1 in the layers palette (the one which includes the green shape) to select the outer perimeter. Make sure your foreground color is set to #ffffff.
Create a new layer above the green shape. Go to select > modify > contract and enter a value of '5'. Then smooth the selection with a value of '5'. Fill the slection with #FFFFFF. Contract the selection by '5' again, and delete the selected area.
Set the layer's blend mode to overlay and opacity to 35%.
Create a new layer above the background, and fill it with a gradient as shown on the left.
Select the top half of that layer, then create a new layer. Select the gradient tool and set it to "foreground to transperant". Click and drag from the center up to create a white gradient as shown here.
Hold down Ctrl and click the layer in the palette, which has the green shape on it. Create a new layer under it, and expand the selection by 5.
Set your foreground color to a dark grey, then make a gradient directing downwards. Your gradient should look similar to mine on the left.
Set the foreground color to white, and make a gradient directing upwards from the bottom.
Open the layer styles dialog box for layer 1, check 'outer glow', and use the following setings...
Blend mode: normal
size: 7 pix
Leave the rest of the options as default.
Congratulations! Your done!