Red Star champagne. After doing more research I realized it probably wasn't the best choice for what i was trying to do. But with some aging I'm hoping that within 6 months to a year I'll have something that resembles hard apple cider. I started another batch using nottingham and its still in the primary chugging along.
From what I've read from others' experiences the nottingham (along with pretty much any other yeast) will ferment dry as well.
There seems to be several schools of thought on creating a semi-dry or semi-sweet cider and it gets more complicated if you want your cider carbonated as well.
You can backsweeten with a nonfermentable sugar such as splenda, xylitol, lactose etc. You can even add apple essence/extract to enhance the flavor of young cider.
If you have a kegging system you might try cold crashing and backsweetening with sugar, apple juice concentrate, honey etc. Pasteurization is another option to stop the ferment-- there is a great thread on that subject stickied at the top of the cider forum.
Or you can wait-- which is what I'm doing. Apparently making cider is very much like making wine in this regard: it tastes better with age.