For Spring users, the JBoss Application Server has been for a long time a popular choice for running enterprise applications. Its open microcontainer architecture allows you to build JBoss-specific extensions that allow a deeper integration with the runtime. This is the main focus of the Snowdrop project, whose 1.0 release was in October 2009. The first part of the presentation will discuss the new developments in Snowdrop 1.1 and 2.0, which will be released in the Summer of 2010 and which focus on Spring 3.0 and the new features of JBoss AS 6. We will discuss things such as the introduction of a new, micro-container centric deployer, as well as support for JBoss-driven AOP, and others. The second part of this presentation will discuss Weld/Seam extensions provided for integrating with Spring and how can existing Spring code benefit from the use of CDI in that context.