For a summary and case study data on the state of RSS adoption, what other email vendors do or don’t offer, plus a round-up of the key issues that marketers need met in order to “switch, look here http://www.marketingsherpa.com/sample.cfm?contentID=2988 Here’s a key snippet: “A few track how many clicks the links sent through RSS get. Another few (often a separate group) track how many site visitors click on the RSS button to start getting the feed. Practically no one tracks anything else… and there’s zero sophisticated tracking we know of at all. No deliverability, open rates, hard vs. soft bounces. No a/b tests, no usability tests, no offer tests, no recency/frequency tests, and multi-variable testing is not even on the map. The kind of data that marketers and publishers rely on to make business, content, and marketing decisions for email campaigns is almost entirely lacking for RSS at this time.”