I saw some new JLU singles at Target for the first time in a long time this week as well. I remember seeing Batman, Green Arrow, Star Sapphire, Aquaman (Orange/Green version from S:TAS), and at least one other character I'm forgetting right now.
Just an update, we were at Target today and I ended up picking up the orange/green Aquaman to sort of finish out the "Super Friends" look to the JL figures that I have. Anyways, just wanted to note that these are now priced at $8.99 (!). I was tempted to get a couple others, but at $9 each for this line (which used to be $5 or less), I passed. I understand that they are store exclusive and everything, but they have been for awhile now. I guess once they officially confirm something as a "collector's" line, it is time to jack the price up. Not surprisingly, all of them (aside from the one I picked up), have been sitting there all week.