For all of you future frustrated iBook Authors...
If the book doesn't show up in Connect in 10 minutes, something is wrong. Most likely, it's an "Import Error." In Producer, go to to File --> Package History and it will show you one of the following:
Uploading -- Package is still being uploaded to the site
Internal Transfer - Package was uploaded and is being copied to another location internal to the Apple
Import Processing -- The Package is being validated by Apple. This is an automated process
Imported -- Everything went well and now the book should show up in Connect with the Status of "under review."
Import Failed -- Good luck figuring this out. My issue was related to some of the videos in the book. We have 50 videos in the book so this was kind of a treat to work on.