Conal> As Meister Eckhart said, "Only the hand that erases can write the Conal> true thing."
Nicely said...
I'm sure you're not the only one desiring to write GUI in "genuinely functional" toolkit, but, being realistic and considering how many people are working on bindings for those "legacy libraries", I doubt we'll see something written from the scratch and usable for "Real World Haskell" soon ;)
I'm vaguely aware that there has been a line of functional-style widget libraries, from fudgets down to developments like arrows and FRP and the various libraries built on that. The fact that the libraries have continued to be research projects and beget further research projects implies that they've had some critical flaws that needed further research. Is there a description somewhere of what the critical flaws have been and are, and what the current problems are to solve before we can finally have a practical declarative and compositional UI library?