So as to standardize and insure that contributors are putting their plugin compatiblity information in the correct location, I’ve moved the compatibility pages under a Plugins/Plugin Compatibilty page in Codex.

2.0 compatibility list:
Old Article: http://codex.wordpress.org/User:Matt/2.0_Plugin_Compatibility
New Article: http://codex.wordpress.org/Plugins/Plugin_Compatibility/2.0

2.1 compatibility list:
Old Article: http://codex.wordpress.org/User:Spencerp/2.1_Plugin_Compatibility
New Article: http://codex.wordpress.org/Plugins/Plugin_Compatibility/2.1

Also a new article, http://codex.wordpress.org/Plugins/Plugin_Compatibility was created to link to the appropriate version article. The old articles are redirected to this page also.