User Plugins for iSync for new Phones can be found here: * http://www.howardforums.com/showthread.php?threadid=1126749

Plugin for SonyEricsson K550i * http://home.comcast.net/~share.ftp/plugins/SonyEricsson-K550.phoneplugin.zip * Quick Install Steps:

1. Download plugin and unzip it.
2. Move entire unzipped folder ("SonyEricsson-K550.phoneplugin") in to /USER/Library/PhonePlugins/
2a. USER is your home folder name. So if your user name is 'tabita', it would be in /tabita/Library/PhonePlugins/
2b. If the folder PhonePlugins does not exist in your Library folder, just create it.
3. Delete any pairings you may have already tried on the phone and computer and repair. I recommend pairing from your mac.