2005 Saab 9-3 AC drain
Is you passenger foot well flooding? watch this video to help you resolve the issues and confirm that it is in fact your ac's evap drain that is causing the issue.
UPDATE:
It's been 8 years, and this video has helped so many people. I remember when I had this issue, I was SO frustrated that there was no video or good post in a forum somewhere to explain this issue. Once I found the spot, I knew what I needed to do. I got rid of this car not long after and got a mustang, which I've really enjoyed, I miss my Saab's but I don't miss the goofy issues!
I'm so glad this video has helped you, and I wish you much luck. Have you changed your oil? It's probably time!