Topaz Labs has a suite of PhotoShop filter plugins that are a lot of fun to play with. I tried out one of them, a filter called Simplify that sort of does what Alien Skin's SnapArt filters do: transform a photo into a variety of art styles.
The first filter setting is called BuzSim, and I like the effect that I get from it. Here's the Wade House (see http://bloggingtheimagination.blogspot.com/2013/05/a-wade-house.html) that I took back in the middle of May.
There are some problems in the lower leaves of the big tree on the left, where they've picked up bluish patches. If it wasn't for those, I'd pronounce this a perfect rendition.