In 2009 they had these racer 'sets':More in this Eurobricks thread.
They were only three pieces, but they were System. I've got one of those thrown in with the kids' LEGO parts. I could imagine using the parts to make more elaborate racers. They have also had Bionicle at some point:
I vaguely remember when they had those, but didn't get any. From that picture they appear to be compatible with other Bionicle stuff.
I very much agree on the horribleness of the 2008 Batman toys
. BTW, we have threads on them here
(in that second link Athos got a couple of them and posted pics to his Brickshelf).
I vaguely recall these hockey things from 2004
Unfortunately, Brickset, Peeron and Bricklink don't really document these various promo items very well, so finding information on them is a bunch of hit-and-miss Googling.