Attached Link: http://www.designer.com/focus/articles/lab/lab_print.htm

ummm, i cant imagine how you got the b&w version from messing with the b channel... I'm confused. Normally the b channel is used to affect the blue and yellow of an image. The L channel is for lightness... this is where the grey of an image resides. Somehow you've managed to invert yer whites! I must say that, for the most part, i do like the results... The leaves in the foreground are especially nice. Would you post what your Lab image looked like before you made the final b&W conversion? I've tried to reproduce what you've done here, but with no luck! I did make ya a nice Lab sepia tho...