I've been using voipo for over 7 years. Plenty of bugs and outages, but it is definitely live.

I think the "beta" tag is more of a disclaimer they use for when something breaks (which happens all too often).... "well, we warned you it was in beta".

Now if you're talking about the pbx thing, that is definitely beta, if not alpha. I stopped using or recommending it, in favor of other more stable options.