There has been a heightened interest lately in using stompboxes and pedals as part of the mixing process. There are a few ways to interface your pedals with your system, but here is a quick video on how I do it using the Meris 440 500 series mic-pre. I like the x-factor of using relatively inexpensive pedals to bring something different to a mix than I might otherwise get with a plug-in. Have fun!
You can read more about the Meris 440 here: