Topsy is all about the power of the ReTweet on Twitter. When the service first launched publicly in May we noted that ReTweets are the new currency of the web. And it isn’t just the number of retweets that matters (which is subject to large scale spamming efforts). It’s the authority of the people doing the retweeting, too.

Today Topsy is releasing new lists of top links being shared on Twitter at any given time. The product is called Topsy TopLinks. There are lists for the Top 100, Top 1,000 and Top 5,000 links. Topsy also now offering a Wordpress plugin that gives sites a TweetMeme-like retweet button. And it also shows any badges earned for the URL in TopLinks.

Topsy, which launched on May 26, 2009, is a real-time search engine, with a focus on social media sites like Twitter. The site’s underlying technology examines popular links as well as the influence of each person citing a link.