The following documents were marked to be 'retracted' or deleted or moved (or something); here's Darci's recommendations on what do with each of them:

How to add a single content type per day

Comment: in progress; no content; added on Aug 5, 2006
Recommendation: contact author and/or remove

Advanced Customization in Plone 2.5

Comment: in progress; no content; last modified on October 16, 2006
Recommendation: contact author and/or remove

Creating Container Classes

Comment: "in progress"; hasn't been updated since March 11, 2006
Recommendation: contact author and have it completed/published/updated for 2.5 or removed; if the former, then it belongs in: Developing for Plone / Other 

Enable Workspaces in your site

Comment: currently marked outdated; applies to 2.0.x
Recommendation: remove? if not, belongs in: ??

Customization Policy 

Comment: currently marked as outdated; applies to 2.0.x
Recommendation: remove? if not, belongs in: ??

A Faker's Guide to CVS

Comment: no longer pertinent to Plone
Recommendation: remove

Documents to keep:

(√) Writing CMF content types using Python

Comment: shouldn't be removed; should be turned into a tutorial; belongs in: Developing for Plone / Creating and Extending Content Types

(√) Introduction to creating and validating forms

Comment: shouldn't be removed; belongs in: Developing for Plone / Other

(√) Drop Down Menus in Plone

Comment: shouldn't be removed; needs editorial work; belongs in:  Visual design / Tabs

(√) Plone product and module descriptions

Comment: shouldn't be removed; needs to be completed; belongs in: Developing for Plone / Overview

(√) Converting forms from the Plone 1 style to the new Plone 2 style

Comment: shouldn't be removed; belongs in:  Managing Content / Other and/or Upgrading & Moving / Upgrading

(√) Integrating CMFFormController with Formulator

Comment: shouldn't be removed; belongs in: Developing for Plone / Other

(√) Create a product to import existing photos as external resources

Comment: shouldn't be removed; needs some editorial work; belongs in: Developing for Plone / Other

(√) How to Embed ViewCVS in Plone

Comment:  shouldn't be removed; belongs in: Developing for Plone / Other