Vitamin D and diabetes?

I read in a recent health article that vitamin D can be a contributing factor to many conditions, including diabetes!

First, the β-cell in the pancreas that secretes insulin has been shown to contain vitamin D receptors. Evidence indicates that vitamin D treatment improves glucose tolerance and insulin resistance. Vitamin D deficiency leads to reduced insulin secretion. Supplementation with vitamin D has been shown to restore insulin secretion in animals.

So, could that mean that Vitamin D supplementation could help combat diabetes progression and/or recovery from diabetes? Anyone have any personal experience?