I've gotten a few comments on my BW action so I thought I'd share which one I use. It's free too!

You can find it at http://www.atncentral.com/

It is Aly's BW

Enjoy and please share what you get with it!

Sometimes I do things with the image before running this action, but if I don't I usually do delete the last flatten command and play with the curves and levels.