Are you concerned about "water pooling" from inside the SIPS? If your concern is water from the outside then you might consider using one of the current generation of rain shield underlayments before you put on your finished siding. Check the March 2003 Journal of Light Construction - there was an article on "Water Managed Wall Systems".
One alternative might be to use very fine screening - but that would be still pretty easy to poke a hole in...
Are you using a dimensional lumber strip on the (inside) perimeter of your SIP?
