I placed an order for one on 8/12 when they were all sold out and got an estimated delivery date of 10/21, but it shipped out today and is set to deliver tomorrow! :)
Having a RAID card also gives you the option of not having your array be dependent on the mobo. I wonder if maybe you can make an image of your current setup, copy that to an external drive, and then reimage it onto your new RAID array? I've never worked with RAID+images so I'm not 100% if...