There are many Wordpress Plugins that integrates your blog and Twitter account. Twitter Tools is a really useful plugin that creates a complete integration between WordPress blog and Twitter account.
Twitter Tool can Archive your Twitter tweets ,Create a blog post from tweets and Post a tweet from your sidebar. For installation and download instructions visit Developers page.
Related Wordpress Plugins:
SimpleTwitter - Easily add Twitter messages to their templates.
Twitter Sharts - Share your twitter status anywhere within your wordpress blog posts
Twitter Tools - Publish on twitter or create blog posts from tweets.
Twitt-Twoo - Update your Twitter status right from your blog’s sidebar.
Twitter Updater - Sends a Twitter status update to your Twitter account when you create, publish, or edit your WordPress post.
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