AOP Workshop

I think the workshop was disappointing...

It started good, but then we got into tiny details of the Spring framework.
It was basically a show off between AspectJ and Spring.

What about standards ? Shouldn't it better be part of the java spec ? If not,
everyone will use their own flavour (javax.aop ??).
What about jdk1.5 and AOP ?

What is the impact in production:
*performance ? are there real sample cases/benchmarks ?
*debug when errors: postprocessed bytecode: how to link with original code,... ?