On his blog, Freitas writes, "We have successfully ported the native C Tor app to Android and built an Android application bundle that installs, runs and provides the glue needed to make it useful to end users.... secure, anonymous access to the web via Tor on Android is now a reality."
The most recent Tor release uses toolchain wrapper scripts to run Tor without requiring root access. Orbot manages the installation, bundles the Tor binary, and furnishes the UI. The app falls under the Tor license and contains a built-in HTTP proxy.
However, the developers who are currently preparing anonymous mobile browsing for its premiere are seeking volunteers for the app and for preparing the privacy-focused Android browser, Shadow. Interested parties should contact Freitas.