Good point. For one of the feeds I tried, I got something like the following: "Feed not found. PostRank will try to index it, so try again in a few minutes." A

Good point. For one of the feeds I tried, I got something like the following: "Feed not found. PostRank will try to index it, so try again in a few minutes." Also if you look at PostRank Topics (http://www.postrank.com/main http://www.postrank.com/main), you can see rankings for posts older than what's present in a site's RSS feed. So it does seem to do some archiving.