First Cup Site Creator integrates with Twitter, and you can add all sorts of "Twittery" Goodness.
Our Add Content Control Panel allows you to natively integrate your Twitter Profile.
So, Tweet, Tweet, Tweet away if you have a mind to...  Need more Twittery Goodness? 
Check out https://twitter.com/goodies and get your Twitter buttons, gadgets, and whats-its.
Bring 'em on into your website using either the Twitter Profile feature on the
Add Content Panel, OR use the html snippet.