Like several of the posters in this thread, I also just recently bought a Go-Vibe (version 2, I guess). I am extremely pleased with the quality of this amp, particularly for its sophisticated sound quality relative to its price. While Version 3 has my interest, I have no buyer's remorse at all. Of course I'll be interested to hear what if any sonic differences there will actually be, but having acquired two quality products in close succession, a Pocket Amp 2 and the Go-Vibe 2, I'm not really ready to add a third amp to the ongoing comparison. I will be looking forward to its debut and the inevitable reviews from this community withthe possibility of a purchase interest by year end if it builds significantly on the existing Go-Vibe.
I haven't found any of this information other than at this site. If indeed the price is $100, that is very reasonable. The current Go-Vibe, if purchased with both opamps included with Version 3, costs $76. For the additional $24 you get the aluminum enclosure and the modified circuit design so it sounds like a no-brainer and not much of an additional asking price to get the latest incarnation of Norm's excellent design.
When I started looking at portable amps not too long ago, I read about Headsave and also learned that Norm had gotten out of the business. Shortly thereafter, I read that Norm reopened with the current Go-Vibe and I jumped on it, even though I wasn't sure if Norm was going to continue on or produce limited quantities. The notice on the Go-Vibe 3 is good news, not just for the fact that an evolution of the Go-Vibe will be coming out, but is hopefully indicative of Norm's renewed commitment to keeping his excellent work coming.