Allen Stern points out that RSS filtering service AideRSS has added Twitter to its PostRank algorithm. AideRSS works by measuring social media interaction with blog posts, and then comparing them to what's normal for that blog. The service then algorithmically applies a ranking to each post allowing users to filter out only the best posts based on the theory that people will only bother interacting with the most interesting or worthwhile content.
We're huge fans of AideRSS...