Good news everyone! Blogtrottr is now using PubSubHubbub.
This means much speedier updates than previously experienced, as rather than polling a feed every hour to look for updates, we are notified as soon as new content is posted. In a nutshell, as soon as new stuff appears on a PubSubHubbub enabled feed, you've got it.
PubSubHubbub is quickly gaining traction, and is already being used by Blogger, FeedBurner, FriendFeed, LiveJournal, WordPress and more, with plugins available for most other popular blogging software, so there's a good chance that some of your favorite feeds already support it.
Visit the PubSubHubub project page for more information.