Use the Auto Post Scheduler to publish new posts and/or recycle old posts, automatically! No need to schedule post times individually, and recycling old posts keeps your site looking fresh.
Especially useful when importing a large number of posts, you can have the Auto Post Scheduler publish them at whatever frequency you choose.
Works great with the auto blogging plugin http://videoblogsterpro.com
Pro version WP Auto Poster completely rewritten to be easier to use, with more features, unlimited rulesets, and premium support.
This plugin is available for download to be used on your WordPress self-hosted installation.