We have a small slope all the way around the yard and it is eroding in many places. We are currently trying to figure out terracing, (looking for ideas for that too!) but in the meantime I would like to plant small (6-8"), quickly growing with good roots to try to stop the erosion in the meantime. I have some cotoneaster but it is not growing fast enough. Trying some kind of sedum, which grows like wildfire, but it is easily pulled up. ANY IDEAS?

You need to put some kind of retaining wall on both sides of the driveway, plants aren't going to grow fast enough. The other option would be to pave the driveway.

Oh, and where are you?