My primary resources for understanding and guidance in DDDD come from various parts of books that are available, many of which Greg has suggested:
- Domain-Driven Design
- Enterprise Integration Patterns
- Pattern Oriented Software Architecture
- Distributed Event-Based Systems
- among others
Greg Young has consolidated much of this information and has been presenting it in a fairly high-level form at various professional conferences during the last few years.
I just found another good resource discussing some aspects of DDDD. Gojko Adzic posted a video of him giving a presentation entitled DDD in a Distributed World. I haven't yet watched it in it's entirety, but he's got a summary version of it in text from as well as the slides posted on his blog. Check it out.