I've got a ton of black & white work which was mostly shot on film.
I still remember loading film into the little black canisters in the dark and being so anxious to see the results. Even though they were negative and you still had to print a proof sheet to get an accurate look at what you had shot, it was like opening presents at Christmas.
Lately I have been experimenting with creating black and white images from color files, both in Lightroom and Photoshop. I still haven't decided which process I think works best or if it is a combination of the two. I'm thinking it's probably the latter of the two, but the jury's still out.
Also, I am still working in CS3, so I'm not sure what new capabilities, if any, are available in CS4. (Probably should upgrade soon.) Although I can't really imagine hoe much more advanced they could get with this process. I seems as though they are covering all the bases now.
Here's just one example that I'm pretty happy with of a recent shoot that was shot with just color in mind.

