Two years ago I recommended Alsheimer's wonderful and thorough book for perfecting black and white digital photography, enhancing in Photoshop, while also managing your photos with Lightroom. You can read the original review here.
There is now an updated edition for CS4 and the latest Lightroom. If you think there can't be much you can do with creating digital black and white images, you need to read this book. If you have a gazillion photos on your hard drive, but haven't tried Lightroom yet, it's time you do (and read this book). I love Lightroom not just because of it's organizational abilities, but it's sophisticated photo adjustments (called aptly, "developing") are often all I need. Asheimer's insights into the art of digital black and white photography should lead you to some exquisite images.
Paraphrasing Alsheimer, you will need to awaken your inner geek for some of the content, but she does a great job of making you feel at ease if you don't quite get it the first time. There are chapters that I have to reread because I don't always remember all the technical info. But, her style of writing is very comfortable and refreshing, and the book is very well edited and designed, so I never feel overwhelmed or bored reading it.