The idea is to search for all content after a specified date/time, but this doesn't seem to include Comments. This would presumably mean re-querying for Comments for every Content item, with no way to just get new Comments. Presumably this would also mean polling each piece of content for new Comments?
Feeds seem to only pass a limited set of meta-data but we could probably live with that, and they do seem to be able to send the full content for all data types including Comments which is great, as is the availability of JSON. However I've also seen pradeepkr's post indicating that there's a problem authentication to secure Feeds which would be a show-stopper for us as these feeds would only be for private consumption. I'm also guessing that Feeds weren't designed for this type of integration so am worried this could lead to other problems?
This would be great, except it seems to only include metadata, and we'd need to re-query each individual piece of post to get the content.