How would you create wind within unity?

hello i was hoping for a bit of help with creating some wind in my game prototype. I have a concept of a plastic bag been blown about in the wind and i have gotten a bit stumped on how to get this to work :/ What i have done so far is grabbed a basic side scroller and a character to stand in for the bag, the trick now is to get the character to basically act like a plastic bag :)

You should probably wait until Unity 3 is released because Unity 3 supports cloth physics. That should make your plastic bag very easy to implement ;-)

See also the preview in the Unity blog: Unity 3 Feature Preview Cloth Physics