yorik

This plugin allows to place widgets on your sidebars, that fetch the contents of one or more RSS feeds, combine them by date if there is more than one, and display their contents in a twitter-like manner, that is, a list of texts, where links, @someone and #something are turned into links.
Use it typically to condense several twitter feeds into one, or to display any other feed that follows twitter syntax, such as identi.ca

Twitter List Widget

This plugin allows to place widgets on your sidebars, that fetch the contents of one or more RSS feeds, combine them by date if there is more than one …

Xavier Media

Every time you make a new blog post this plugin will post a status update to the Status.net servers and Twitter accounts 
you have specified. You can set as many acounts on as many servers you like. You can even have the plugin to post to 
different account on the same <a href="http://status.net" rel="nofollow ugc">Status.net</a> server.
The links to your blog can be shortened by one of seven different link shortener services like TinyURL.com.

WP-Status.net

Posts your blog posts to one or multiple Status.net servers and even to Twitter

Twitter List Widget vs WP-Status.net