So, according to this Slashdot piece, AOL is blocking referrals from LiveJournal. Now, after a scan of Evan Martin's post (and I haven't read the Slashdot thread), I really don't believe that this is deliberate. More likely, it's an attempt to block deep-linking of images that is somehow being a bit too technically over-zealous in what it will and will not let through.
I'm not an AOL apologist, so if they are blocking all LiveJournal sites maliciously, I'll be disappointed.
However, before we all get up in arms about what is assumed to be going on, it's probably worth analyzing how a company as large as AOL really benefits from this sort of gesture.