I have to decide which version to use for a new project. It is going to be in production in a half year from now. On one hand, the released version of SI is 1.0.3 and it has everything I need for a project. On the other I'd prefer to use Spring 3.0 from the beginning. Can SI-1.0.3 be used with Spring 3.0? How stable is SI-2.0 M1? Do you think SI-2.0 GA can be released before May?