> The date of the ECMAScript document (ISO standard for JavaScript)
> is December, 1999. Not a big risk.

Hmmm... perhaps not:
http://en.wikipedia.org/wiki/JavaScript
http://en.wikipedia.org/wiki/ECMAScript
With AIR and Silverlight going beyond JS1.5, the risk could be larger
than you think. However, for the foreseeable future 99% of the world
will think of JS as JS1.5 / ES3. You don't run on IE otherwise.

> Paul, I'm looking for something to layer on, not in, the engine.
> Or, in other words, something to call the engine, not be called by
> the engine.

I know. However Cosmin isn't (I think). Personally, I'm looking for a
way to make it easy for developers to manage the state space of
applications and transitions therein, including a way to manage
caches in the entire stack, from database to client.

Lua and/or JS are only tangentially interesting at the moment, as a
potential way to handle macro-transactions.

Paul