The message was actually found fully the other day on Reddit with the release of one of the tax forms as evidence. Good call but youre a little late to the party.
There have been two messages since the ones posted to reddit. One two days after the reddit decrypt, and one last night/this morning (depending on your time zone).You can see this by checking the time stamp (although all the details are in this thread).
The reddit thread died a few hours after their decrypt. It seems everyone decided it was a hoax and lost interest. They are probably right about the hoax part, so if you just wanted Romney's tax returns then chances are slim. But if you are interested in bitcoin itself there is some interesting stuff there. Read through this thread to see what's happened since.