I am having the same problem with my 15 month old daughter. My first two children walked at 9 1/2 months and were running in circles by 15 months. I get so frustrated some times because I can't get anything done. The worst thing is she CAN walk she just doesn't want to. I've seen her go when I wasn't really paying attention and she'll walk between people and things, but is very stiff. When she holds my ONE finger she walks like a pro. Everyone says she'll do it when she's ready.
I guess they're right, but we still make a big hoorah when she walks on her own. She really likes to take steps outside in the yard to pick flowers. We take her out often to see her progress.