Get hourly updates on your favorite topics. Alltop is an "online magazine rack"; pick a topic by searching, news category, or name, and they deliver it.

AllTop is one of my all-time favorites, mostly because it was my first Hot Sheet contribution, but also because it's a great place for information and an easy way to find experts in a field.

Want to stay on top of Twitter's hottest topics? Hop on over to TwitScoop:

Referring to itself as "the Smithsonian of the web," this service allows users to organize topic-specific links, tweets and media into collections. Use it to stay up-to-date on topics that interest you.