For Drupal 7, check out https://drupal.org/project/node_authored_select which has some added features.
Transforms the autocomplete Author field on node add/edit forms to a select widget. That way, the user doesn't have to guess the first couple letters of the desired username. Instead, he/she can just browse the select box and find it.
Note that this module isn't really useful for sites with many users because the select box will be so big.
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