There hasn't been anything regarding Justin's Rajin Cajun in quite some time. Last I heard, he was in partnership with someone planning to open in Scottsdale last fall, but nothing materialized.
Then, on CitySearch, an address near 7th Street and Deer Valley Road in Phoenix showed up, but that turned out to be a residence.
I just checked the old website address and it stated the domain is now for sale.
Taking that all in to consideration, I think Justin's Ragin Cajus is now just a part of Valley history.