I googled the one that Henry mentioned. I agree it's a bit expensive, but tearing in the wind would be a bigger concern for us. Of course we're used to dealing with row cover, and have lots of handy rocks to weight that down (it does sometimes get away though!).
There's a 'creped' version which sounds like it may be not a slippery surface, that would help if using leaves to mulch on top (yes they like to blow away too!).
http://www.weedguardplus.com/creped-...00000250-group
If you assigned a minimum wage to the hours spent weeding, I think it would be worth it.
At least, for a farm scale operation where there is a lot of weed pressure. And again, if it reduced the weed pressure for the crop that follows that would be money in the bank too.
I think of other ways of reducing weeds - solarizing with plastic to kill seeds for example - and it means that the land is not in production during the peak season. Where at my friend's farm, every bit of usable land is sown in rotation.