I have searched around the internet to see what community might be interested in this and I've found it. A site dedicated to the Chrono series that still gets updated in 2012 while Square has deprived the world of any sequels for over a decade would probably thing just a tiny bit interesting.
I've had this beta for a few years now and I'd like to share some info about it for those curious. It has been many, many years since I've played Chrono Cross and I badly lack the ability to distinguish beta from retail, yet alone even remember most of the game's details.
What I can tell you is that I only have the first disc of this and that debug is enabled by default. The 7 debug rooms all exist in this beta and are all translated into English (with the exception of one of the rooms that seems to be completely corrupted). The entire disc is in English so this is definitely a beta of the NTSC release. As such I'm not sure how much interesting "beta" material is in this build. Also, at the time I received this disc there was a small piece of the data layer missing that has only gotten worse with time, so there may be areas of the game disc that will not load as a result.
From my preliminary mucking around, this seems to have everything in the first disc proper up to the concert with Nikki (roughly 500 maps worth of game play), but then again I don't really remember where the first disc ended.
So yeah, enough babbling. I'll post some screenshots once I get ePSXe to cooperate and take questions/requests from anyone interested in this small piece of Chrono Cross history.