Carl Smith , Apr 10, 2004; 01:48 p.m.
The best way to shoot B&W with digital is to shoot color.
Shoot color images all the time, don't waste your time with the B&W modes on any camera. Take the color image in to photoshop and you can select channels, blend channels and do so many things that you have more capability than if you were to put color filters on the camera. It's a very versatile method.
If you shoot in color and want to see what it would look like with a red filter, just remove the blue and green channels in photoshop. There's also a channel mixer where you can choose how much of each channel you want to include to produce a B&W image.