I would upgrade to wordpress, far more functionality and you own the content not google. I have installed the sexy bookmarks plugin, and it works fantastically well, and it also allows for digg's, stumble's ect. If you just want to post a link then here's some simple html code <a href="http://twitter.com/home?status=Enter status message here" title="Click to send this page to Twitter!" target="_blank">Tweet This!</a> Code (markup): The "Enter status message here" bit should be changed with your message. This, when clicked, will insert the "Enter status message here" text into your visitor's Twitter status boxes. You can also use an image by doing: <a href="http://twitter.com/home?status=Enter status message here" title="Click to send this page to Twitter!" target="_blank"><img src="TwitterButtonSource.jpg" width="xxx" height="xx" alt="Tweet this!" /></a> Code (markup): Obviously changing the src, width and height parameters as necessary
Hope you mean install wordpress yourself under your own domain name. People should avoid free Worpress hosting as they tend to deleter blogs overtime with no justified reason