Announced recently by the team at MTouch (Moodletouch.com), their efforts are focusing on supporting Moodle 2.0 and making their app universally available for all major phone platforms. Could be one of the first private/paid Moodle mobile apps available universally.
From the announcement,
We are happy to announce that we are prototyping a universal version of mTouch which is intended to work for all mobiles with no server side hacking and no client side installation. Yes that is true, no client side installation will be required for the next generation of mTouch.
If everything goes well we intend to publish the next generation mTouch by the mid of 2011 supporting Moodle 2 as well. [link]