release of Spring 3.1, there is some great material to help you get up to speed with the new enhancements. InfoQ has published another talk from SpringOne 2GX 2010, this one covers the Configuration Enhancements in Spring 3.1. Chris Beams covers unified property management, bean definition profiles, nested elements, c: namespace, Grails BeanBuilder integration.
Also last week Juergen Hoeller gave a webinar on the Spring 3.1 milestone release. In case you can were not able to attend in person, a full recording of the webinar has now been posted so you can get all of the details from the source!