Recent Tweets Widget plugin for Twitter API v1.1 with Cache. It uses the new Twitter API v1.1 and stores tweets in the cache. It means that it will read status messages from your database and it doesn’t query Twitter.com for every page load so you won’t be rate limited. You can set how often you want to update the cache.
To get Consumer Key, Consumer Secret, Access Token and Access Token Secret, you will need to visit this link, sign in with your account and create your own keys. Also you may find useful this tutorial: Authenticating a User Timeline for Twitter OAuth API V1.1.