James Robertson has a post comparing exception handling in Java and Smalltalk.  This is really eye-opening for me, especially Alan Knight's explanation on the implications for debugging in both environments - essentially, that the stack state up to the point where the exception was thrown is preserved into the exception handler, allowing one to debug the state at the time the exception was generated, as well as resume execution back where the exception was thrown.  Pretty cool.  I need to look at Smalltalk.