I've been playing about with that Cinque Torri panorama and various ways of creating B&W conversions.
I came across the
Gorman-Holbert method, which I think produces great results.
You end up with a solid colour layer which you can then manipulate to create whatever colour toning effect you wish
eg.
Then I decided to brave it

and record my own
Photoshop Action in PS2 (pressed 'Alt+F9'), clicked the 'new action' button in the actions palette, and followed the instructions in the
Gorman-Holbert page. (I missed out their final step, 50px high pass filter, as I'd already sharpended this photo).
Once finished, clicked the 'stop recording' button, and hey presto I now have a B&W conversion action which I can re-use, and change the colour toning anytime a want by double-clicking on the colour box in the colour fill layer.
I'm quite chuffed really!
I've attached my action for anyone who wants to help themselves to it... DavesB&WAction.zip
And here is one of the end results:-
Cheers!
Dave