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.