James Governor of RedMonk has a point in his blog
Wake up IBM: come out from behind developerworks!!!
If it isn't obvious already, developerWorks focuses on a mixed audience of programmers, sysadmins, architects, testors, etc. all those directly involved in the software development lifecycle. Hence, our blogs fall in the same cloud too.
IBMers do have other blogs both on the site and outside, but there isn't an area for "all IBM blogs" externally from the global IBM site yet. Honestly, that falls beyond dW's scope.
IBM blogging versus developerWorks blogging