They are already available. But they are on the 61.5 satellite, so if your current satellite only points to 110/119/129 then you need to call Dish and gripe for a free additional satellite. They will originally offer you a new sat. dish for either $100 bucks or a 2 year commitement, but if you complain enough they should give in.
Are there any plans to move them to one of the other 3. I'm not crazy about getting a 2nd dish. This sucks because I upgraded to HD a couple of months ago and got a new dish and DVR that cost me almost $600.