What are decorators?

[gohaku]

Hi everyone,
The discussion on Python Decorators and "@" has piqued my interest on 
this
"feature?" in programming languages such as Python and Java.
can anybody what is the point in using Decorators?

The examples I have seen written in Python of this "Not Yet 
Implemented" feature
are confusing to say the least and perplexes me as to its usefulness.

Thanks in advance.
-gohaku