Hi Alexander!
Welcome to the mailing list!
Migrating projects from express to flatiron is relatively easy. Our
middleware stack, union, contains a stack of middlewares it will run
before the main router in the 'before' property. You can see examples
of this at
https://github.com/flatiron/union and
https://github.com/jesusabdullah/node-ecstatic . You can also write
various types of shims for your middlewares to use inside director
routes or in a plugin. I just wrote a library that does this earlier
today at
https://github.com/jesusabdullah/node-equip .
I'd say my biggest suggestion with respect to using flatiron right now
would be to use hard versions for the less mature projects.
I also wrote a small
hook.io plugin for broadway that looks like this:
https://gist.github.com/1795820
You may find it helpful.
--Josh