Hey,
since we don't have too large active testing community yet, we are not in rush with releases. Although if you want, i can slide you some recent build and some samples under the table. If you are interested, just mail us at info@corona-renderer.com
If you attach some IM contact, like Skype or Google talk, things may go even faster as i can explain you all the undocumented parts personally ;)
Edit: Sorry, i accidentally edited your post instead of creating a new one. But i hope i did not change anything. Sorry bout that ;)