Welcome back to another installment of This Week in Spring. We've got a lot to cover this week, so let's get to it!

1. Gordon Dickens is at it again, this time with a great look at Spring 3.1's constructor namespace, which provides the logical counterpart to the p: namespace element.
2. Matt Vickery's at it again! He's got an interesting post on how to use the C24 iO product with Spring.
3. The Vaadin blog has an interesting post on serialization with the Vaadin web framework and Spring.
4. The Java Code Geeks has a blog post on using the RESTEasy REST framework with Spring-based services. While I would recommend the Spring REST support in Spring MVC over this approach, it's at least interesting to have the recipe if you ever need to use it.
5. The Java Code Geeks blog has another post on building Spring-based JPA services that sit behind a RESTful CXF backend. This is another one of those situations where, while it's useful to know how to do in case you need to, you're better off using Spring MVC's REST support. It's easier, and integrates more naturally with the component model.
6. The Banging My Head Against a Wall blog has a great post on Upgrading from Spring 2.5 to 3.1. This blog shows that the migration is dead simple, if you haven't already made the jump, and he's got insight into one particular little gotcha you might hit to make the migration that much smoother.
7. The TeamExtension blog has a quick post introducing how to get started with Spring Mobile 1.0. They recommend stock Eclipse with the m2e support, but of course, if you use the SpringSource Tool Suite, you won't have to set anything up.
8. Are you a .NET developer looking for a solid dependency injection framework like Spring? Have you heard about Spring.NET, the dependency injection framework from the same people behind SpringSource? Blogger Łukasz Budnik has an interesting post about Spring.NET's superiority over other alternatives in the space (Microsoft's Unity and Ninject).