The word is finally out. It was just a suspicion about a month ago, but it was finally, sadly, confirmed.
The OpenWengo project ceased to exist last November, and all the developers have been laid off. You may want to read the whole thread and see how much sadness there is amongst the developers and the community. All of the developers have to find other jobs, while we, the community, have to find some good alternative VoIP & IM software.
And it's going to be hard.