Compendium of Curious Words

Here in The Engine Room, Apus and I have written about all manner of unusual and intriguing words, from 'applipac' to 'zero'.

I've just put together a Compendium of Curious Words, which lists them all - and links them back to the original blog posts. It's a knol, but don't be scared.

'Dialogue' as a noun. Or possibly not

Spotted in a recent piece of corporate communication:

I have already made a personal commitment to dialogue with the union about the changing environment we face

Is this an example of 'dialogue' as a verb or just an example of 'commitment to' + noun?

I've never come across the former before, although it is listed in my Concise OED: "v. chiefly N Amer. take part in dialogue."