We will be building a Firefox Beta update tomorrow (2011-06-03) morning EDT. We will be taking the latest code in releases/mozilla-beta and creating updates for our beta audience to test. Both mobile and desktop will be building at this time.
This means patches approved to land on mozilla-beta should come in today, or they will have wait another week for the next refresh.
We intend to have the update on the beta channel the following week, most likely Monday or Tuesday afternoon PDT.