Red looks like it's still in active development, and "heavily inspired by REBOL."
To date, Red can't even run without already having REBOL installed on your system. The project has been around for almost two years now, and only a few days ago has it successfully been able to do the program "print 1".
The announcement this week about "print 1" is about the fact that now the "Red" (higher, rebol-like level) language is also at the brink of working.
No one has ever built a significant business on a new general-purpose programming language. It doesn't seem to be due to the relative lack of IP protection on languages either. It may be that it's simply not a problem worth solving, there's no solution worth marrying a vendor over, or there are too many language designers.
Rebol has so many interesting ideas in it that it really could have carved a respectable niche in the world of networked programming languages. Just having sensible pragmatic built-in types for email and money was enough to bring it to my attention.
It's is a very odd but amazingly powerful little language worthy of study by anyone interested in language design. It has been a big influence on me even if I have never used it for anything 'real'.