It is a personal Twitter summary report. We use a special algorithm to determine which tweets are the most important based on link popularity. Tweeted links then show up in your report, organized by relevance. The algorithm is calculated using Twitter friend retweets, total Twitter tweets, popularity on other services,… The report comes once a day, weekly or monthly. When you sign up, you choose exactly what time you receive the report.
It would be nice if you could take a look at TweetPort and give us feedback :)