Word is that the founders of Switchvox, which Digium acquired in 2007, have moved on to other pastures. Tristan Barnum is going to a Hosted PBX provider in San Diego to be head of marketing. One is staying at Digium for another 90 days. The rest ... unsure.
It's funny about Digium. They used to have this home grown, open source story (similar to Red Hat, a $1 Billion business now) - and then they took on too many ADTRAN folks, who turned it into something like ADTRAN.