How do I get Unicorn to show post parameters in the development log?

Question

I just started giving Unicorn a try (over Thin), and so far I do like the format of the output, except that it doesn't appear to show the post parameters for various requests. I really like this functionality to help debug forms etc....

Unicorn:

20:26:14 web.1     | 127.0.0.1 - - [17/Jan/2012 20:26:14] "POST /basic_simulations HTTP/1.1" 422 24259 0.4838

What I want... (this is from webrick):

Started POST "/basic_simulations" for 127.0.0.1 at 2012-01-17 20:27:22 -0700
Processing by BasicSimulationsController#create as HTML
Parameters: {"utf8"=>"✓",
"authenticity_token"=>"xxxxx", "basic_simulation"=>{"x1706"=>"1"}, "commit"=>"Submit my answers"}

Is there some config option or something of the sort where I can turn this functionality on? Thanks!