Assuming you are on Mac, there are ways to connect these applications but not with the Rewire protocol. You can use Jack for OSX to send audio data between applications and I think there is a way for Midi too but my main platform is Linux.
I described that briefly at: http://elektronengehirn.blogspot.com/2009/12/pdforlogic.html
Cheers,
media art + development http://www.block4.com