Today I upgraded the acegi library to version 1.0.0 RC1. It was a quick process, but you do need to make a few changes. The complete package structure is changed, JdbcDaoImpl class has been moved and some other changes as well. Have a look at the release notes in the downloaded acegi package. There was a nice addentum on the spring forum that you need to change the inclusion of the taglibrary as well.
<%@ taglib uri="http://acegisecurity.org/authz" prefix="authz" %>
Have fun, I will start documening the sample within a few weeks now.