At Web Traffic Service we often use WordPress as an easy to use and simple yet flexible CMS for clients. One of our favorite plugins for WP is Tweetable by redwall_hp. Some updates need to be noted to get it to work however, mainly that sometimes authorizing a Twitter application for Read & Write access by default needs to be done from the following site: https://dev.twitter.com/apps instead of the site referenced in the installation wizard. If you’ve been having problems with Tweetable try that and see if it helps!