Just to show how easy it is to make a button in MediaPlayer11-style. Here’s a short HowTo on how to do this in Expression Blend:
In Blend, open a New Project…
Select Ellipse in Toolbox
Drag Ellipse 150px, Hold Shift to constrain to circle
Click Stroke, Add 3px brown stroke to the circle
Create RadialGadient Yellow, Dark Yellow, Yellow
Click Brush Transform in Toolbox (G):
Copy And Paste Ellipse in front of existing Ellipse
Hold ALT and Shift dragging lowerleft handle to the middle of the ellipse.
Fill LinearGradient White on Top, White op bottom, with Alpha set to Zero.
Set Stroke to none
Select Object/Path/Convert to Path
Select Direct Selection Tool in ToolBox (A)
Drag bottom Controlpoint up above the middel of the lower ellipse
Finish up with characters from WingDings font and a circle with Black to White diagonal LinearGradient behind the button.