What is it:

A "schwa," the neutral unstressed vowel sound.

Why:

Enron has gone from one of the world's most powerful corporations to a neutral, de-emphasized, "dead" company.

What's this?

A dead one of these. 

It's an old joke.  The "e" upside down makes Enron's new logo look as dead as the company.  It's on it's back, floundering. The distressed edges give it the "falling apart" feel you'd expect from a company that recently, well, fell apart.

Plus, it sort of makes them look like they're "behind the 8-ball."