Upgrading from 1.0 to 1.3 is a big transition, but most of the changes
should be covered by the rails upgrade guide.
Have you tried generating a new 1.3 app and using that as a working example?
> I have upgraded rails, and following the guide for upgrading rails, but i'm
> getting config/initializers/hobo.rb:1: uninitialized constant Hobo
> (NameError)
>
This sounds like a problem with your Gemfile -- do you have Hobo
included in your Gemfile and have you run bundle install?
config/initializers/hobo.rb is an example of one file that is
different in 1.0 vs 1.3, although your specific problem sounds a
little more fundamental.
Bryan