getPrismatic.com/ finds content for you by looking at what you have shared on Twitter, the publishers you link to, and who your friends are (it will eventually account for Facebook as well). But the content doesn't only come from your Twitter feed - it comes from anywhere on the Internet, using clues in your feed to find things that will interest you.
You can use your existing Twitter account, we do not store or receive your password and there is no need to create just another account on some website. You are good to go, enjoy the data.
Most important from your Twitter stream
The Tweeted Times aggregates news in your Twitter stream and ranks them by popularity among your friends. Never loose any important news!