Vin Diesel (The Chronicles of Riddick) is going to dip back into directing and producing. Relax, he's not going on hiatus from acting again just yet. Universal has given him permission to direct a 20-minute prequel to The Fast and Furious as a promo for the upcoming fourth installment in theaters June 2009.
It'll feature Diesel, Michelle Rodriguez, who is said to die in the 4th film, and Sung Kang, who played Han in the third film Tokyo Drift. It's still unclear on how the prequel will be released--the best bet for now is via the Internet.