Implementing a new site and don't want a bunch of zeros for the number of re-tweets. I found a post on hiding this number in a Wordpress blog and it worked exactly the same here. Edited the tweetmeme css as follows:

.tweetmeme-button {
  float: right;
  overflow: hidden;
  width: 70px;
}

.tweetmeme-button iframe {
	position: relative;
	left: -15px;
}

Now the number of re-tweets is hidden. This would be great as an option in the configuration.