As far as I can tell from the Github it looks like this build is mostly build.prop clean up along with a few other minor things to telephony.
Edit: For anyone who downloaded the "DoNotTweet" build from 12 AM CST-ish this appears to be a new build. dhacker says on Twitter that both cameras now work on this build. There is a SuperUser issue with this build that causes multiple permission requests on certain apps such as Titanium Backup and Root Explorer. This is from the CM10 source that dhacker/hashcode used so hopefully it'll be fixed either in the next source release or by dhacker/hashcode soon.
Edited by DemoManMLS, 21 September 2012 - 11:36 PM.