redirect routes need some detailed design.

a) There should be an easy way to define internal redirects. Important thing here is that the destination url should be defined using routes by itself. I am not sure about the syntax, but url_for need not be available at the moment (for example, if redirects need to be defined earlier than the destination routes)

b) There should be some explicit way of selecting which kind of redirect is to be performed (permanent, temporary, ...).

c) In case of internal redirects it may make sense to handle 'invisible redirect' (just picking the destination object using the redirected-to route without generating any redirect to the browser) as one of the methods.