I am currently taking a digital photography class at a local community college. Our most recent class discussed the use of Split Toning for B&W conversion. The link below describes some Split Toning presets for Lightroom. Below are two images, one is a straight B&W conversion and the second uses the "Lenswork Warm" preset described in the attached .pdf file. The change in color is very subtle, but I think the change warms the image and makes it more appealing.
http://www.frankmercer.com/Black_Whi...Lightroom2.pdf
No Split Toning
With "Lenswork Warm" preset
