So, the paid and free android clients are now exactly the same, other than the fact that the free version displays adverts. Both fully support SSL (including self signed certs), both have the notification service, both have the widget etc…
Going forward I hope to introduce similar functionality on the iPhone client, however my first priority (since more people have asked for it) is to support digest authentication.
To that end I’m in the process of setting up a test server, and should be able to report some progress soon!