F1.4 or f1.8 lens for Nikon D5000?

I have a Nikon D5000 and would like to get a new lens with excellent depth of field. I would like to spend less than $200 if possible. If there aren't any for that price range, then list the cheapest ones.

I already have a 18-55mm AF VR and 55-200mm AF VR

Does Nikon make a 55mm or 50mm f1.4 or f1.8? Or what similar lens can I get for my D5000? Auto focus if possible.

Added (1). Update: thanks to both contributors for providing quality responses! I'm so thankful and very pleased. I wish I could pick both of you for best answer. So I'll send to voting instead.

There's a 50mm/1.8D for about $140 which will not autofocus on the D5000
There also is a 50mm/1.4D for about $300 which won't autofocus either.
And there's a 50mm/1.4G for about $350 which will autofocus.

Also consider the 35mm f/1.8 which will autofocus on your camera. It won't have as much DOF control as the 50mm f/1.8 due to the shorter focal length, but will still work nicely. Cost is just under $200.
A comparison of the 35 & 50mm f/1.8 lenses:
http://picasaweb.google.com/...Comparison