Yeah, there should still be warranty unless you did something that voids it.
There's no Rampage 3 as far as I know, nor any other new & exciting LGA1366 boards that I know of (though I must admit I haven't paid that much attention to the 1366 side of things).
It's near time for a refresh, but news of new 1366 boards is dead silent. We'll likely have to wait until Intel refreshes the ICH with Sata 6Gb/s and USB 3.0.