Are you aware of any DDD efforts in a dynamic language ?
Practical resources on DDD tend to decrease quite dramatically when straying from enterprise-oriented solutions (a google search exluding C#, .NET, ASP and Java yields 10 times less results), but i couldn't actually find a single example of a DDD implementation in a dynamic language...
No, I'm not, but the principles remain the same so there shouldn't be any reasons why it wouldn't work out just as well, especially if the dynamic language in question has a good OO support (e.g. Ruby).
Even better perhaps, since your domain model could more easily make use of e.g. traits/mixins, and concepts from DCI, etc. if there's a fit.