The Huntsville, Alabama company Digium is mostly responsible for it’s development. They also sell hardware to use with Asterisk. Like the TDM400p which is part of a Developer kit I just bought and installed. Here are all the del.icio.us bookmarks I have for Asterisk. My favorite site so far is VOIP-info.org. There is so MUCH knowledge there it’s amazing!
Lots of folks discussing now how Asterisk could be used for creating mobile podcasts aka mobcasting. EXCITING!