Andy Pemberton has written an article about the new Portlet 2.0 support in Spring 3. He uploaded a small example that you can put in your portal straight away. The article focusses on the interesting things Spring 3 is about to release when facing portlets.
http://blogs.captechventures.com/blog/andy-pemberton/spring-3-example-portlet-and-overview
Manning is about to produce a new book in it’s ‘In Action’-family about the development of portlets. The book is written by Ashis Sarin and will contain 13 chapters of which only 2 are published so far in the early access phase. Reading this book for the first time, it looks promising, giving an easy to understand introduction to portlets.
The book uses Liferay as it’s default portal server, because it is available at no cost. The book focuses on the new 2.0 specifications and gives in depth information for using porlets with Spring MVC and the usage in the enterprise environment.
Overall this book looks very promising. It’s release date is planned for september 2010.