Here are the slides and code from my talk last night (4th November, 2009) at scotaltnet in Edinburgh.
BDD References:
Introducing BDD (Dan North)
A New Look at Test-Driven Development (Dave Astels)
What’s in a Story? (Dan North)
The RSpec Book (Chelimsky, et. al.)
Behaviour-Driven Development (Dan North’s talk at Oredev 2007)
BDD Tools:
NBehave
IronRuby + Cucumber
At the time of my presentation, cucumber with IronRuby was very slow. This has been improved by updates to cucumber and by the introduction of Cuke4Nuke. See http://gojko.net/2010/01/01/bdd-in-net-with-cucumber-cuke4nuke-and-teamcity/ for an example of this.