I found a way to get to sync calendars. Just download this new file and put it in /Library/PhonePlugins. If you have an old version of the MOTZ3 plugin you can just replace it with this one.
If you've already have your Z3 in sync, remove it, and remove it from your list of bluetooth devices. (otherwise you'll end up doubling up your contacts on your address book)
Go through the "Set up Bluetooth Device" to add the Z3, then go to iSync and add it there. Make sure the "on first sync" option is set to erase everything on the phone instead of merge, otherwise you'll end up doubling up your contacts.
Contacts and calendar should sync fine now.
NOTES, please read:
You need isync version 2.4 for this to work. I've not tested it on anything else but I'm almost positive it won't work on an earlier version.
I created this plugin by modifying Apple's Moto K1 plugin. The Rizr is very similar to the K1.
I recently had to re-flash my Z3 because bluetooth stopped working on my phone. I don't think this has anything to do with the plugin but user beware! (reflashing the phone did fix the problem however)
enjoy
http://www.sporksalot.com/MOTZ3.phoneplugin.zip »