Question

If an event is dispatched by a service should I include the word ‘service’ in the event class name? For Example TwitterServiceEvent. The same applies to Models and Mediators.

Answer 1

In robotlegs book “Actionscript Developers Guide to Robotlegs” they are not using it that way:

_remoteService.addEventListener(TwitterEvent.OVER_CAPACITY, dispatchOverCapacity);

But if you want it and it helps you, you can have it, why not.
I use signals, but when I name signals, I name them the same as the command is named with different suffix:

ConfigureViewSignal
ConfigureViewCommand 

Also, did you check out AS3 Signals and SignalCommandMap for robotlegs?
https://github.com/robertpenner/as3-signals
https://github.com/robertpenner/robotlegs-extensions-SignalCommandMap