Enterprise Integration patterns

I was going through the Martin Fowler signtaure series book, Enterprie Integration Patterns, and found it extremely interesting and thought provoking, so I thought why not start a thread here to discuss the various patterns described in the book:-

1) Which of these patterns have you used or would like to use?

2) Where is it that you don't agree with the author and think that a particular patterns as described might add to problems rather than otherwise?

3) Which ones did you find most interesting and eye opening, I mean when you read them you shouted something like "EUREKA" or DAAAAAAAAAAAAAAAAAAAAH.

[633 byte] By [kilyasa] at [2007-11-27 0:01:30]