Windows Phone 7 Connector v1.1 for Mac is out there with some features improvements, and bug fixes.

What’s New in Version 1.1
Windows Phone 7 Connector 1.1 provides the following updates and changes:

Features:
Windows Phone 7 Connector Agent allows customers to configure Windows Phone 7 Connector to start whenever a supported device is connected.
Apple Lossless encoded audio files are now supported and synced to devices.

Fixes:
Resolved high CPU utilization problem in certain sync situations
Performance improvements.

Download Windows Phone 7 Connector v1.1 for Mac