This group is about Domain-Driven Design, or DDD.
DDD is defined by its creator, Eric Evans, as follows:
"...Domain-driven design is an approach to developing software for complex needs by deeply connecting the implementation to an evolving model of the core business concepts.
Domain-driven design is not a technology or a methodology. It is a way of thinking and a set of priorities aimed at accelerating software projects that have to deal with complicated domains.
The premise of domain-driven design is two-fold: Place the project's primary focus on the domain and domain logic; and Base complex designs on a model."
You can learn more about DDD on domaindrivendesign.org and domainlanguage.com.
DDD-NYC has been meeting since Fall of 2007.