sorry for the delayed response—email is in my profile, feel free to reach out with more questions.
I've got a post or two on my blog[0] (haven't updated it in awhile, but working on it!) and I just released a gem[1] to facilitate event-sourcing in ruby. Its young, but i've refined the api a bit from where I started a couple years ago (when it was just an experiment), and it has a much cleaner implementation now.
For more info about CQRS/ES and DDD in general, I recommend starting here[3] and lurking on the DDD mailing list[4]
