A creation/post/publication date field

[Carlos]

... or maybe better simply name it creDate.

There should be no compatibility problems with mvlcek's plugins that use that field -- I've just taken a look at I18N Custom Fields' code and seems ready to use existing creDate field and function get_page_creation_date

(Unless someone thinks it's better to have 3 different date fields for: last update, creation and public/ation)