api docs for unreleased packages

Is there a good reason to not have API docs generated for unreleased packages? If not, is this a system that could be changed? -- I certainly think it makes sense to have different API docs for each release (or at least the most recent one), but it would also be extremely useful to have access to the API docs for CVS versions of packages. Especially pertinent for packages that don't have other end-user documentation but have usage docs in the phpdoc (which I imagine is fairly common since you guys use such a high-cost-of-entry documentation system :) Cheers, Hans