Okay, I've seen @djsundog and other talk about Forth a lot recently.
I know a little bit about forth, because of a book I read a long time ago, but that book was about programming in general, not about forth specifically.
If I understand correctly, the important thing about Forth is that it can be extended easily?
What else makes it interesting or neat? I missed the boat on this one, and I'd like to understand.