Cool option from gliffy. I have been using this service for nearly 4 years (off and on). It does everything I need as I rarely take things as a system from a UML tool to code generation. But it definitely provides some good options, good availability, and rapid dev.
Wait, mid post I read the fact that its embed does not work in WordPress and I have to use a simple image… Boo!!!
The emotional let down was akin to this. I say they could make up for it if they added Publish to UML. 
FWIW, the diagram here is a DFD for View/Controller classes and how their controllers affect the models which in tern dispatch events that their views listen to. I am torn between implementing public methods on the models that the controllers call and using events that the controllers send and the models listen to. I am pretty sure that a many to one call and a one to many event is the best pattern. Open for debate starting now…
