Obviously, these don't offer concrete proof, but they probably mean that Facebook is at least working on an Android-compatible mobile application.
Now, TechCrunch reports that the app is real, and that it is coming soon. Very soon. In fact, as soon as this week.
What will the application offer Facebook fanatics? TechCrunch says:
Proof positive? Maybe.
Facebook's Android app will launch with a more limited set of features than its current, and very popular, iPhone app. For instance, it won't have an inbox, I'm told by a source who has seen it. But it will have the full Facebook stream, which is really all you need. The Facebook Android app is built around the stream and status updates. It was built with Facebook's new Stream API. Your updates keep coming in, with a notification number telling you how many new items are available at any given time.
Competing platforms such as the iPhone and BlackBerry have been given highly capable versions of Facebook that let users access many of those services' features. That Android will have a limited feature set from the get-go is disappointing, but even moderate functionality is better than nothing at all.