It'* funny you ask that... High Performance Chevy has a new issue that deals almost exclusively with supercharging. If you're going for decent power numbers and want an all-around good driver, you'll want to be in the ballpark of an 8:1 compression ratio. The SSEi uses 8.6:1, and some guys put turbos or blowers on L36 bottom ends (9.4:1). If you get up much higher than that you won't be able to run as much boost, and if you get too low you'll have to make a ton of boost to make any power (which is sometimes not feasible based on the heat you would generate with a small pulley).
That'* just a general guideline... I certainly don't have firsthand experience with superchargers. But you might find it helpful to pick up that magazine and read up