I attended a meeting tonight at my local Linux Users Group in Columbia Maryland.  The topic was on getting an Asterisk Voip server up and running and was presented by a couple members (John and Terry), who have both been playing with different Asterisk distrobutions. John went the route of the full-featured trixbox, and Terry went for the minimal installation on an embedded device, showing just how flexible and customizable Asterisk is.
My work has recently agreed to migrate our phone system over to an Asterisk server, so I’m hoping to get that set up in the next week or two so that I can start playing with it.