- /Twitter, StatusNet, and Facebook: see Connectors
- Diaspora: enter the Diaspora user's "site ID" (not sure if this is the correct term, but it's the email address that uniquely identifies them across all nodes, and typically has their home node's domain name in the email address) in the "Connect/Follow" field in the "Contacts" tab.
- RSS/Atom: enter the URL for the RSS/Atom feed in the "Connect/Follow" field
- mailing lists: not sure how this works
There was something tricky about the base URL for the API, I can't remember the details except that there were 3 URLs listed and what you want to enter is the part that they all have in common, which was something like "domain.name/API/" (specifically not including "OAuth/"). I think this was for StatusNet, but will have to check.
- a way to see what the security settings were (especially which other sites are being cross-posted to) after submitting a post
- a way to filter by source-site (e.g. don't show posts originating on Facebook) as opposed to viewing only posts from a given site
- a way to put up site notices/links in various places -- top of page, left side...
- the search feature is already an improvement over the one on G+, but it could be improved further
- choose scope within which to search
- available more universally instead of having to hunt through the tabs to find it
- Viewing post "in context" should let you comment if commenting is allowed
- See this thread for links to some useful tools