Felipe Cecagno posted the availability of the first public release for download. This release supports both chat and voice.
Here's a list of participants in the session and in the voice conference:

Here's a view of the client in landscape mode:

We downloaded their client a within a few minutes were using our android phones to listen and speak in a BigBlueButton conference. Very cool!
For further links, check out Felipe's post to bigbluebutton-dev.
This is great progress Felipe. Getting voice working is a BIG milestone.