I like REBOL, I like it a whole lot.
It is because, these types of simple to use scripting languages are worthwhile, and help people do what computers are fundamentally all about: be more creative and more productive.
REBOL is a great product, and I love this browser plug-in. scriptics abandoned the tclet browser stuff a (tcl/tk browser plug in) a while back, and this browser plug-in from ReBOL is much welcomed, in my opinion.
I used to work for a fortune 500 company, and I tried to evaluate rebol as our standard scripting language. We chose perl instead, because more people know perl, and partly because rebol completey ignored our request for information (this was 3 or 4 years ago).
Great to see rebol still moving things along after so many years of obscurity, and I think this browser plug-in is a fantastic idea.