We managed to find out that Nvidia's GTX 590 dual GPU card is going to be a bit late. Nothing to worry about as the card is pulled from originally planned March 22nd to March 24th as driver simply wasn't ready in time.
Of course, you should take all reasons regarding the launch date with a grain of salt as Nvidia won't go official with the details but some sources are saying that the driver was late and that the card should be ready for a March 24th launch.
It isn't a big deal as the card will launch in the same week as planned but on Thursday rather then Tuesday. We'll just have to wait a bit longer.