I love Grainy B&W by Rita from The CoffeeShop Blog. Use the action, if installing them works fine with you. If you just can't make it work try as you might, like me, follow the tutorial to create the effect yourself. There's even a grainy texture to add.
Adjustable Black & White Conversion in PSE by Helen Bradley.
7 Black & White Photoshop Conversion Techniques by Andrew Gibson.
Custom Selective Colour Video Tutorial for PSE7 (includes how to "borrow" a layer mask) by Karen Brackney.