I Write Like
It does some statistical analysis on your writing and spits out a similar author. I put in like six of my posts from this blog (just the first segment with the meat of the review) and got a few different authors. The only consistency was Vonnegut who came up three times, in particular for Rah Rah, New Year, and Bay Window. I'm pleased with that.
And this short story I'm "working on" gave me Palahniuk.
I'm really tempted to plug in Christian's too, but I don't want to take the fun away from him.