The two journals for which this decision would most affect me are (as Jeff already noted) CGTA, and the European Journal on Combinatorics. CGTA has been a very friendly place to publish computational geometry papers, and for now there are no non-commercial alternatives devoted to computational geometry. And EuJC is the main outlet for research in the cubical graph theory I've been working on lately. However, I'd rather have a clear conscience about how I publish my work than continue being part of the problem.
I do currently have one paper in submission to a different Elsevier journal (as well as one still to appear in CGTA); I've considered withdrawing the submitted paper over this issue, but it's already gone through a round of review and I don't want to feel like I've wasted some other academic's time over this issue. So those will stay (although I welcome feedback telling me to do otherwise) but no more.
ETA: More on Elsevier's fake-journal unit and on not publishing with Elsevier.
ETA2: John Baez does some price comparisons.