This application for the iPhone is able to:
1. list the tasks you have in your Nozbe account
2. send the tasks selected to SmartTime

So you only have one central Task management and SmartTime for organizing your day by day tasks.

You can follow the status of the development in: http://twitter.com/Nozbe2SmartTime

Some picture of the application (not uploaded yet): http://twitpic.com/photos/Nozbe2SmartTime