Are you looking for perennial or annual or does it matter? I'll have some seed off of my cypress vines (annual, aka. cardinal vine) here in about a month...
I'm tearing out some perrenial morning glory. They are bright blue, fast growing and bloom like crazy all year. They are seedless but they run all over the place. PM me your address and I'll send you some roots. They grow easily from root cuttings. Sorry I don't have a close up of the flower.
here is a page on it. As you can see the farthest North it has been reported growing is Illinois. There are some nice closeups of the flowers here: http://davesgarden.com/guides/pf/go/51653/