Avoiding eqnarray

Since reading about its faults in The Not So Short Introduction to LaTeX (highly recommended read), I have avidly stayed away form eqnarray. However, I feel as if the book didn’t covey the ideas as well as it should; also, it suggestion was IEEEeqnarray, apposed to the classically recommended align. This article on TeX User Groups conveys ideas more eloquently and provides better alternatives.