I have a small xeriscape front yard with a very fast growing groundcover. It loses it's leaves in the winter. The "vine" is like a smooth tree branch, about 1/2 inch in diameter. It has flowers now of a blue/purple. No garden center can identify it. I can take a photo, but just curious if it rings a bell with anybody.
A picture would definitely help. If none of your garden centers know it, it's probably not something super common so a picture would probably get you a faster ID. Also when you do get a picture you might try posting it in the Plant Identification forum, it gets more traffic than this forum does.