Let's freeze Unstable until we are ready to release a Stable version.

Pros:

Cons:

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On the other hand, maybe this would encourage more appropriate use of experimental ...

I have concerns about the state of unstable, and how long it would take to get it into a releaseable state compared to testing. Look at the release-critical bug lists to see the dramatic difference at the moment (December 2004). -- ColinWatson

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I think there should be a constraint on unstable that every package should be reasonably releasable and be able to reasonably expect that the package will be ready for migration to testing within a certain period of time.

That means tracking the stable upstream releases in unstable unless there is good reason. CVS pulls and development trees belong in experemental. --MikeFedyk

See ReleaseProposals for alternatives.