The bigger issue is that we are relying more and more to few centralized services on the Web, which doesn't really interop well with each other and does not res

The bigger issue is that we are relying more and more to few centralized services on the Web, which doesn't really interop well with each other and does not respect continuity in terms of data or API. Take a look at Twitter API 1.1 changes, etc. There are more examples of this. At least Google Reader support export subscription list using OPML format.