Hmm... interesting. I was about to make a comment about how IBM had moved a lot of their stuff behind the IEEE paywall, as a couple of weeks ago I went looking for some IBM publication and could only find it in IEEE Explore, and something I read led me to believe that all issues of IBM Systems Journal and IBM Journal of Research and Development were now only to be found at IEEE. But I looked again just now, and it appears that most (maybe all) issues of both journals are, in fact, still freely available. Weird.

Not sure if I saw an old page, or if something has changed in the past couple of weeks, or what, but at least for now, it appears that a significant body of IBM research material is still freely available.

And to make it even more confusing, I now see that some links from http://researchweb.watson.ibm.com/journal/ redirect to the IEEE site, but the actual article is still freely downloadable. Not sure how universal that is, as the article I was trying to access a couple of weeks ago, was very much not available for free (at the time). Weird. shrug