I wanted an easy way for visitors to tweet about my blog posts. Found Tweet This and use it in my blogs.
A plugin that adds a Twitter link to every post and page, so your readers can share your blog entries on their Twitter accounts with ease. Shortens URLs in advance.
I like that you can either use your own blog links or pick one of many services that shorten URLs. The plugin also create links for StumbleUpon and some other social bookmarking sites.
I use shorter links based on my own blog links. The full link is this:
but TweetThis uses the shorter version:
I have switched and used the built-in bit.ly links.
Update October 11, 2009.
I have switched to the TweetMeme Button WordPress plugin which does retweets only.
For current plugins at this site: see WordPress Plugins I Use.