If you like the look of real film grain in your black and white photos you can get some at this link: http://byscuits.com/grain-tm400.png

Instructions for use are here: http://www.prime-junta.net/pont/How_to/n_Digital_BW/a_Digital_Black_and_White.html?page=5


I took a quick stab at the process in the following photo.

Here is another example using the grain.

what! I work hours to get rid of grain!!
actually, in some images it does enhance the photo. I like the folks in the second shot!
regards, tom