Funny, IOWA makes no mention of WebObjects in any of the docs I looked
at, whereas CGIKit mentions it up front.
Intrigued, I downloaded IOWA to have a look, but the example pages
didn't come up :(
The design of IOWA was indeed heavily inspired by WebObjects; it's
also a dead project, and it doesn't at all surprise me that it doesn't
work with recent versions of Ruby.
My work on IOWA jumped environments to Squeak Smalltalk almost two
years ago, and became "Seaside". (More recently, small parts of
Seaside have been ported back to Ruby as "borges", though not the
parts you would recognize as WOF-like). My philosophy of web app
development has also diverged a lot from WO since I wrote IOWA - most
notably, I don't use the template/bindings idea anymore, preferring to
specify templates programmatically and link them to the model with
callbacks (blocks). I've also extended the subcomponent model to be
quite a bit more powerful, leaning much further towards composition
(vs inheritance) than typical WO apps do.
My standard recommendation to those interested in IOWA (which must get
awfully tiresome on a Ruby list) is to learn Smalltalk and use Seaside
- it has an extra couple of years of development thrown into it, about
100 more users than IOWA ever had, and 10 or so more commercial
projects under its belt. I don't think many people have taken me up
on this, however. ;)