Aliam, thanks for the link, I visited it and I think you misunderstood, unless I did.
1. It says "He also developed the ubiquitous 'alata' hybrid you see at the hardware stores. While we refer to it as a ventrata hybrid (N. ventricosa x alata), it is technically N. alata x (ventricosa x alata)."
Which means that the plant he was referring to is a "Ventrata hybrid" which means a hybrid of a hybrid. Too bad he did not give us the commercial name because that is exactly what I asked in my post, what is the name of such a ventrata hybrid.
Anyways what I mean is that it is safe to say that Ventrata is still (Ventricosa x alata) and the Ventrata hybrid that was referred is AlataxVentrata.
I myself have a Ventrata from Japan. It makes very tiny pitchers and frankly some of my pure alatas give much more red color. I do like the Ventrata because it has cute pitchers. I also notice though that the pitchers are more like an Alata, which means they do not last that long as a Ventricosa pitcher. So maybe I have one of those different variation. Mind you my Ventrata was just IDed by members because the store only tagged it as "Nepenthes sp." cool eh? So vague!
TTFN
Arvin