Generate events from consecutive entity (aggregate?) statuses

Hi all,
I am quite new to ddd and all its related aspects like EventSourcing, CQRS,
etc…
and lately I discovered this list as really helpful to understand both the
basic or subtle and more advanced concepts.

Currently, I'd like to have some feedback about the design of a part of a
system, since I have lots to learn in this context.

The system continuously monitors external entities (aggregates) status:
this means that, for example, a job J is launched now and asks for the
status of an Aggregate A to another system,
and stores its snapshot in an internal repository.

Based on the previous snapshot of A in the repository, after storing the
current A snapshot, the job J should generate a list of events related to
the A status change: for every type of change that A can have, there is a
specific type of event that should be produced and sent in the system for
further processing.

If the A aggregate at time 0 had a field name = "Anna" and at time 1 is
name = "Anna F.", the event fired should be something like "entity A
changed name to 'Anna F.' at time 1".

Storing all the sequence of snapshots of every aggregate provides the
system also a way of replaying them, producing again the events that were
produced in first instance. This will help also testing, I think.

How does that sound to you?
Do you have some advice or relevant links to learn from?

Thanks!
Matteo

PS: I pasted a snippet here [1] to illustrate the snapshot repository APIs
that I came up with until now.
[1] https://gist.github.com/mox601/5646540


-- 
Matteo Moci
http://it.linkedin.com/in/matteomoci
http://about.me/matteomoci/bio