A loooong time ago, I wrote my own version of Minesweeper. This was mainly so I could have custom sizes, and also so I could play it purely with the keyboard and not the mouse. I also added another handy feature... UNDO! If you accidentally click on a bomb, you can reset it.

Here's a vid of me playing it. It has examples of:

A. Custom Size. In this case 33 x 33, with 300 bombs
B. playing with the keyboard. You guide a blue square around so you know where you are. It doesn't take long to learn to do it as fast as I am with the keyboard if you just stick with it.
C. And this has an example of undo where I accidentally hit a bomb.

I don't finish the game, it will end when the time hits 253. So I guess that makes the vid about 4 minutes long.

http://www.birdieman.com/pics/forum/vid/bombminer33x33x300.avi