I bought this plant just as a trial when I was placing my order with Select Seeds, and so far it is a real winner in the garden at the Big House. It is actually "Convolvulus tricolor," which bears very little resemblance to a morning glory under than the shape (and perhaps the color) of the blooms.
In any case, it has stood up (and even thrived) in the crazy Atlanta heat, and is dancing in and out amongst some of the other things in the perennial bed. It is fairly compact, and is a great stand in for the blue geraniums that fill that role during spring and fall.
I started some inside and some directly outside in the beds, and both are doing beautifully. This is definitely going to be on next year's shopping list, as well.