Yes rebol can be used to script web pages, like jsp, asp.
And that, is primarily where it is used, if you ask me.
There really isn't much point to rebol for generic application development.
What's odd about Rebol is a few years ago, it supported almost every platform available - and that wasn't really important because everyone was using Windows.
Now, we have this real split in the marketplace, where some are using Android, some using iOS, some using Blackberry, some using WinMo - on their Smartphones, and soon, on their tablets....
and yet now Rebol punks out and doesn't support any of those devices.
Now I've been an it professional for a couple decades now, I know why it would be difficult to support a platform, when well...Apple is blocking you. Google maintains control over Android too, despite the impression of being so open.
But - that's the challenge in this world...unfortunately Rebol doesn't solve too many problems, and I love scripting languages, and I agree with a lot of Carl's rhetoric, I just don't believe he's found any great answers.
Even the bill for the old Rebol of being a dialecting language was a bit of a joke, because he didn't even understand people speak different languages (talking about spoken languages and their intersection with programming languages)....what's the point in creating dialects, and missing the big picture about differing languages all together.
But I digress....that dialecting stuff isn't even mentioned a lot anymore, so we can move on from that.
Too bad about Rebol, but without support for the hot platforms, I'll have to pass.