How to auto-retweet : Step 1 create an account at http://twitterfeed.com/, Step 2 use my yahoo pipe to create an RSS feed http://pipes.yahoo.com/pipes/pipe.info?_id=5581606723e62fea7d7fc2fed77ab44f, Step 3 log into twitter feed and use the RSS feed above to retweet to your profile. Yes its cheating but saves a lot of time.
Retweet tweets with a given keyword and/or from a given user
Creates an RSS feed based on: 1. A input keyword or hash tag (fed to twitter search) 2. A user name that is provided 3. Feeds out data in a Retweet format. This can be passed into another Twitter account by the feed bot from TweetBots.com