Here is a fun site that supposedly analyzes your writing and tells you who you write like. I tried a couple of things I have written and they tend to come back as either Cory Doctorow (which I can live with) or Dan Brown (which is embarrassing). However, it does seem to return the same answer if you enter the same text, so it's not just picking writers at random.
In any event, it looked like fun, so I thought I'd post it here. So, who do you write like?
I just entered the above post and in comes back Cory Doctorow.