[Mongrel] exception logging

[Dane Jensen]

Hi all-

I'm running mongrel with a tiny HttpHandler that hooks into a larger  
library I'm working on. I've run into a snag with trying to debug  
with it in that I'm not entirely sure how to get the exception logs  
of errors that are raised.

All I get to stderr is this:
	Fri Dec 22 17:16:14 -0800 2006: ERROR: Couldn't find Models::Contact  
without an ID

While I like knowing an error occurred, I'd really really really love  
to know where and be able to find why.

I'm probably missing something simple in the docs, but how do I turn  
this on or set it up?

Thanks,
-Dane