Topix, launch in march, have already made a makeover and add some new features in it. Now with more than 7000 sources, this news aggregator was my favorite news site since he be online. The 150,000 topic's page have now a email alert and RSS feed. Some on the news also get a small popularity ranking box.
But the main new feature, who should be adopt by other site, is the dynamic sub-menu. When you drill down in categories, the submenu of that category will reflect you visits. They also be reorder with your latest categories you have visited. Very smart feature!