AllTop is the creation of Guy Kawaski. Alltop aggregates content from leading blogs around the Web, allowing you to get the hottest new information all in one place.
As a blogger, Alltop can also be a tremendous traffic source if you can get your blog listed. You can submit your site at:
Suggest a Site for Alltop
9Rules.com is another top content aggregator online the pulls the best content from around the web into one location. 9Rules accepts submissions throughout the year. You can see when their next opening is at How do I join 9rules?