Google has rolled out a subtle change to Google Reader that lets you create custom feeds to track pages that don’t already have them. You can subscribe to updates for any webpage simply by typing the URL into the “Add a subscription” text box.
A few bit.ly users who also heavily use Delicious and Twitter have asked for an easier way to sync all these services. We recently came up with a pretty good way to automate this sync process using Twitterfeed.
By filtering your results by popularity, you'll be able to pare down a bunch of results that are presumably all relevant into the top sites on your topic, or some surprising ones you might not have heard of.
Love Digg's RSS feed but don't have time to keep up with it all? Disstill is like your regular Digg RSS feed but filters out stories below the minimum diggs that you set.