/*************************************************************
If you have the wordpress twitter plugin
http://rick.jinlabs.com/code/twitter/ (my favorite :) )
this code:
* turns the bulky text link to the tweet into a compact icon
  (e.g. you can save http://tratmap.com/twitter-bird-icon.jpg)
* sets all the links to target='_blank'

(requires jquery.js from http://jquery.com/).
See example at http://tratmap.com
*************************************************************/
$(function() {
    $('.twitter-item').each(function() {
        $(this).find('a').attr(
            'target','_blank').slice(-1).html(
            '<img src="/path/to/twitter-bird-icon.jpg"/>').attr(
            title','View Tweet')}
        );
});