I'm also not American (well, technically I'm, but you meant from the USA not from the American continent) but yeah, I think it's still ongoing, although I remember hearing a while back that Valve settled some case, not sure if this one (notice that settling doesn't mean admitting guilt or that they were going to lose, but sometimes it's just cheaper to settle than to keep defending yourself (the problem is that on the long run this sends a message that you're a good target).

Also I believe they would have won the claim that they don't enforce price parity just by pointing at the other game from Wolfire (Lugaru) which is paid on Steam and free outside of it, and Valve never did anything about it.