twitter tools is a pretty cool wordpress plugin that allows you to integrate your tweets (postings on twitter the popular microblogging site) with your standard website. it is a pretty lightweight install and configuration is a snap. upload the php file to you plugins folder and the activate it inthe plugins panel in your wordpress admin site.
not only can you have your tweets show up on your blog, but you can also configure it to allow a daily or weekly digest of your twitter activity. you can also choose to ignore you @replies to other firends on twitter since their posts will not show up and a one-sided conversation is never really interesting.
you can also post to twitter from your blog whenever you publish a new entry on your site. all-in-all this seems to be just the type of integration many folks have been asking for.