VoicePulse has just released the VoicePulse Global Provisioning System (VGPS), an open-source tool for bulk provisioning Aastra, Cisco, Linksys, Polycom, Sipura, and Snom phones. The system is easily adapted to accomodate other phones with text/xml configuration files and provides for an easy way to manage many different types of phones through one simple API.
Version 0.1 of the software can be found at sourceforge.net/projects/vgps/. Feedback through the SourceForge forums is welcome and appreciated!