Guy Nirpaz is VP R&D of GigaSpaces from Israel.
He's a strong Agile proponent, and runs an interesting blog with an Agile slant, talking about Java Development, his open source projects, and how they are successfully implementing the Scrum Agile Methodology in their organization.
Much like Ayende, he talks a lot about containers and Inversion of Control, but from the Java Perspective.
A nice blog to have in your RSS reader to get some points of view from the Java Side.