Occasionally on Twitter I am asked to retweet something; a competition, a charitable cause, a tweet to raise awareness. By doing so, I believe I am endorsing the information in the tweet or accompanying link - I am showing my support. More often than not, I try to add a few words into the retweet to express my opinion. This is easier using a third party client such as Tweetdeck as the Twitter web only allows a direct retweet with no alteration to the original text. This is where endorsement issues can arise.
... blogging my guts out