Kay - Here too Porcelain Vine stays in bounds due to our winters. My friend (and neighbor) has one growing on her privacy fency. I love the beautiful berries. You really do have great shade gardens.
Carolyn - That's what I've begun to do too. I'm thinking they should do fine underplanted under some shrubs. The only problem I may have is that I only have about 7" of "good soil" then clay underneath. In some areas the shrubs compete for root area. I have 3 Tardiva Hydrangea planted too close together (but I sure ain't moving them!) and the roots are to the top of the soil. I think I can fit a big hosta under there though in the center.