Jon Udell points out Bob Martin, Ward, and Guido van Rossum have entered the blog world. I'll pay particular attention to Ward's, he has a singular style and an uncommonly sensible approach to software.
Both have been instrumental with JINI and JavaSpaces, the two best satellites in the Java universe.
The blogsphere has achieved another level of benefit for software developers with the addition of this new handful. I'll have to check out the others in their sidebars.