UPDATE (09.05.2013): Instead of using this, you should probably get the official workflow from here.
This updates the “old” myPhoneDesktop for Alfred App Extension to work with Alfred v2. The main script is from the Alfred v1 extension, and has not been modified at all.
For a full guide of how to use this extension, read this post about the original Alfred extension: myPhoneDesktop for Alfred App Extension
Note: I am not affiliated with the original author of the extension nor with myPhoneDesktop. I just needed this for myself.
Download: Send-to-iPhone.alfredworkflow