Some writer mateys were recently told about 'I write like' at http://iwl.me/.
Paste a few paragraphs of your work into the text field and hit the Analyze button.
I posted six different excerpts from different pieces - I got 2 Stephen Kings, 2 James Joyces (I don't think so) and 2 Margaret Atwoods. Interesting.
The list of writers must be fairly short, but it's a giggle.
Do YOU write like a genius?