In the absence of any recently taken shots I've been playing with B&W conversions on existing images.
Here is a selection of B&W channel mixer conversions from Nepal – hope you like ‘em!
I think some fo them work well, others not so well.
Show me your channel mixing work - I am interested to see your results! I have tended so far to using mainly the red and green channels (blue seems to carry more noise in most of my shots), and I'd be interested to hear your experiences of this method of B&W conversion.

http://www.pbase.com/davecollier/image/78851265

http://www.pbase.com/davecollier/image/78782603

http://www.pbase.com/davecollier/image/78851263

http://www.pbase.com/davecollier/image/78851296

http://www.pbase.com/davecollier/image/78790222

http://www.pbase.com/davecollier/image/78790214
Dave