I too am interested in hearing where T-Rex Rumble is heading now, it basically went silent after the delay last year!
It was listed in the SEC filing which was released a few days ago so I guess it's still in development, apparently it's a DSiWare only game now.
I don't remember where I read it but I remember reading that the game was "almost gold" a few months ago. I think it might have been an interview on IGN or 1UP?
If I can remember my schedules correctly, Spring in the corporate world is up until June 30th?
If I had to guess and the game did indeed go gold, I'd say it was probably backed up in the Nintendo approval process?