I disagree. I think there are a lot of great ideas in Weblocks. True, there are some not-so-great ones, but designing complex web frameworks is hard. I think Slava did an impressive job with Weblocks, even though I later ripped out large parts of his design and replaced it with something else :-)

Web programming is not a solved problem. I haven't found a framework yet that I'd really like to use.

Also, there are real-world applications using Weblocks — read my post above. I am not entirely happy with the state of affairs, but it isn't really weblocks' fault, but the CL environment in general.

As another data point, I find the Clojure environment to be much more mature, because of the JVM and many widely-used Java libraries.