I am extremely proud to be able to point out that Digium has acquired Switchvox. Switchvox is an amazing packaged PBX system that is based on Asterisk. A team from Digium did an extensive analysis of the products available in this area, and concluded that the Switchvox package was superior in terms of features as well as ease of use. Check out the Switchvox features and some screenshots. Part of the plan is to work with the Switchvox team to take parts of the technology they have developed, and contribute it back to the open source community.