Avalon and EJB

Hi again!
Thank you very much for all the quick answers to my question about 
"context".
I will have to do one lecture about the avalon-framework at my university 
and today my tutor asked me: "So what is so especial about the 
avalon-framework?". I would like to pass this question on to you guys:

Is all said by "Seperation of Concers" and "Inversion Of Control"?  Can I 
not achieve exchangeability simply by encapsulating Java-Objects and using 
well defined interfaces? How does Avalon compare to the EJB-concept? Is it 
comparable at all?
Samuel: Why do you think EJB is far away from Independency/Seperation of 
concerns?

One practical question to get me started with the avalon-tutorials:
It seems I need "Ant" and the "Magic antlib" to compile them. How do I 
install "Magic antlib"?
Do I have to check out all the dpml-stuff and compile Magic? I already 
compiled the corresponding merlin-tutorials with maven. Unfortunaly the 
simple-web example never worked. Is there any hope the ant-built version 
will work?

Many Greetings...

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