Nobody does 0day gems like Intridea. First they released OAuth2 the same day Facebook announced their plans for it. This week, they created tweet-button the same day Twitter unveiled their new official tweet button.
Tweet button is a simple helper to provide a nice Ruby interface for adding the button to your page:
= tweet_button :via => "changelogshow", :url => "http://wynn.fm/twbtns", :text => "This is so meta!"
which will yield
Configurable options include:
:url- The URL to share; the default is the current URL.
:text- The text that will appear in the tweet; the default is “Check this out!”
:via- The attribution. Defaults to “tweetbutton”, but you should change that.
:lang- Set the language for the tweet (no default).
:related- Related Twitter accounts (no default).
:count- The tweet count box position (values can be “none”, “horizontal”, or “vertical”; default is “vertical”).
Check the README for advanced features.